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| <?php | |
| /** | |
| * WordPress DB Class | |
| * | |
| * Original code from {@link http://php.justinvincent.com Justin Vincent (justin@visunet.ie)} | |
| * | |
| * @package WordPress | |
| * @subpackage Database | |
| * @since 0.71 | |
| */ | |
| /** | |
| * @since 0.71 | |
| */ | |
| define( 'EZSQL_VERSION', 'WP1.25' ); | |
| /** | |
| * @since 0.71 | |
| */ | |
| define( 'OBJECT', 'OBJECT' ); | |
| define( 'object', 'OBJECT' ); // Back compat. | |
| /** | |
| * @since 2.5.0 | |
| */ | |
| define( 'OBJECT_K', 'OBJECT_K' ); | |
| /** | |
| * @since 0.71 | |
| */ | |
| define( 'ARRAY_A', 'ARRAY_A' ); | |
| /** | |
| * @since 0.71 | |
| */ | |
| define( 'ARRAY_N', 'ARRAY_N' ); | |
| /** | |
| * WordPress Database Access Abstraction Object | |
| * | |
| * It is possible to replace this class with your own | |
| * by setting the $wpdb global variable in wp-content/db.php | |
| * file to your class. The wpdb class will still be included, | |
| * so you can extend it or simply use your own. | |
| * | |
| * @link https://codex.wordpress.org/Function_Reference/wpdb_Class | |
| * | |
| * @package WordPress | |
| * @subpackage Database | |
| * @since 0.71 | |
| */ | |
| class wpdb { | |
| /** | |
| * Whether to show SQL/DB errors. | |
| * | |
| * Default behavior is to show errors if both WP_DEBUG and WP_DEBUG_DISPLAY | |
| * evaluated to true. | |
| * | |
| * @since 0.71 | |
| * @access private | |
| * @var bool | |
| */ | |
| var $show_errors = false; | |
| /** | |
| * Whether to suppress errors during the DB bootstrapping. | |
| * | |
| * @access private | |
| * @since 2.5.0 | |
| * @var bool | |
| */ | |
| var $suppress_errors = false; | |
| /** | |
| * The last error during query. | |
| * | |
| * @since 2.5.0 | |
| * @var string | |
| */ | |
| public $last_error = ''; | |
| /** | |
| * Amount of queries made | |
| * | |
| * @since 1.2.0 | |
| * @access public | |
| * @var int | |
| */ | |
| public $num_queries = 0; | |
| /** | |
| * Count of rows returned by previous query | |
| * | |
| * @since 0.71 | |
| * @access public | |
| * @var int | |
| */ | |
| public $num_rows = 0; | |
| /** | |
| * Count of affected rows by previous query | |
| * | |
| * @since 0.71 | |
| * @access private | |
| * @var int | |
| */ | |
| var $rows_affected = 0; | |
| /** | |
| * The ID generated for an AUTO_INCREMENT column by the previous query (usually INSERT). | |
| * | |
| * @since 0.71 | |
| * @access public | |
| * @var int | |
| */ | |
| public $insert_id = 0; | |
| /** | |
| * Last query made | |
| * | |
| * @since 0.71 | |
| * @access private | |
| * @var array | |
| */ | |
| var $last_query; | |
| /** | |
| * Results of the last query made | |
| * | |
| * @since 0.71 | |
| * @access private | |
| * @var array|null | |
| */ | |
| var $last_result; | |
| /** | |
| * MySQL result, which is either a resource or boolean. | |
| * | |
| * @since 0.71 | |
| * @access protected | |
| * @var mixed | |
| */ | |
| protected $result; | |
| /** | |
| * Cached column info, for sanity checking data before inserting | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * @var array | |
| */ | |
| protected $col_meta = array(); | |
| /** | |
| * Calculated character sets on tables | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * @var array | |
| */ | |
| protected $table_charset = array(); | |
| /** | |
| * Whether text fields in the current query need to be sanity checked. | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * @var bool | |
| */ | |
| protected $check_current_query = true; | |
| /** | |
| * Flag to ensure we don't run into recursion problems when checking the collation. | |
| * | |
| * @since 4.2.0 | |
| * @access private | |
| * @see wpdb::check_safe_collation() | |
| * @var bool | |
| */ | |
| private $checking_collation = false; | |
| /** | |
| * Saved info on the table column | |
| * | |
| * @since 0.71 | |
| * @access protected | |
| * @var array | |
| */ | |
| protected $col_info; | |
| /** | |
| * Saved queries that were executed | |
| * | |
| * @since 1.5.0 | |
| * @access private | |
| * @var array | |
| */ | |
| var $queries; | |
| /** | |
| * The number of times to retry reconnecting before dying. | |
| * | |
| * @since 3.9.0 | |
| * @access protected | |
| * @see wpdb::check_connection() | |
| * @var int | |
| */ | |
| protected $reconnect_retries = 5; | |
| /** | |
| * WordPress table prefix | |
| * | |
| * You can set this to have multiple WordPress installations | |
| * in a single database. The second reason is for possible | |
| * security precautions. | |
| * | |
| * @since 2.5.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $prefix = ''; | |
| /** | |
| * WordPress base table prefix. | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $base_prefix; | |
| /** | |
| * Whether the database queries are ready to start executing. | |
| * | |
| * @since 2.3.2 | |
| * @access private | |
| * @var bool | |
| */ | |
| var $ready = false; | |
| /** | |
| * Blog ID. | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var int | |
| */ | |
| public $blogid = 0; | |
| /** | |
| * Site ID. | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var int | |
| */ | |
| public $siteid = 0; | |
| /** | |
| * List of WordPress per-blog tables | |
| * | |
| * @since 2.5.0 | |
| * @access private | |
| * @see wpdb::tables() | |
| * @var array | |
| */ | |
| var $tables = array( 'posts', 'comments', 'links', 'options', 'postmeta', | |
| 'terms', 'term_taxonomy', 'term_relationships', 'termmeta', 'commentmeta' ); | |
| /** | |
| * List of deprecated WordPress tables | |
| * | |
| * categories, post2cat, and link2cat were deprecated in 2.3.0, db version 5539 | |
| * | |
| * @since 2.9.0 | |
| * @access private | |
| * @see wpdb::tables() | |
| * @var array | |
| */ | |
| var $old_tables = array( 'categories', 'post2cat', 'link2cat' ); | |
| /** | |
| * List of WordPress global tables | |
| * | |
| * @since 3.0.0 | |
| * @access private | |
| * @see wpdb::tables() | |
| * @var array | |
| */ | |
| var $global_tables = array( 'users', 'usermeta' ); | |
| /** | |
| * List of Multisite global tables | |
| * | |
| * @since 3.0.0 | |
| * @access private | |
| * @see wpdb::tables() | |
| * @var array | |
| */ | |
| var $ms_global_tables = array( 'blogs', 'signups', 'site', 'sitemeta', | |
| 'sitecategories', 'registration_log', 'blog_versions' ); | |
| /** | |
| * WordPress Comments table | |
| * | |
| * @since 1.5.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $comments; | |
| /** | |
| * WordPress Comment Metadata table | |
| * | |
| * @since 2.9.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $commentmeta; | |
| /** | |
| * WordPress Links table | |
| * | |
| * @since 1.5.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $links; | |
| /** | |
| * WordPress Options table | |
| * | |
| * @since 1.5.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $options; | |
| /** | |
| * WordPress Post Metadata table | |
| * | |
| * @since 1.5.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $postmeta; | |
| /** | |
| * WordPress Posts table | |
| * | |
| * @since 1.5.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $posts; | |
| /** | |
| * WordPress Terms table | |
| * | |
| * @since 2.3.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $terms; | |
| /** | |
| * WordPress Term Relationships table | |
| * | |
| * @since 2.3.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $term_relationships; | |
| /** | |
| * WordPress Term Taxonomy table | |
| * | |
| * @since 2.3.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $term_taxonomy; | |
| /** | |
| * WordPress Term Meta table. | |
| * | |
| * @since 4.4.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $termmeta; | |
| /* | |
| * Global and Multisite tables | |
| */ | |
| /** | |
| * WordPress User Metadata table | |
| * | |
| * @since 2.3.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $usermeta; | |
| /** | |
| * WordPress Users table | |
| * | |
| * @since 1.5.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $users; | |
| /** | |
| * Multisite Blogs table | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $blogs; | |
| /** | |
| * Multisite Blog Versions table | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $blog_versions; | |
| /** | |
| * Multisite Registration Log table | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $registration_log; | |
| /** | |
| * Multisite Signups table | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $signups; | |
| /** | |
| * Multisite Sites table | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $site; | |
| /** | |
| * Multisite Sitewide Terms table | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $sitecategories; | |
| /** | |
| * Multisite Site Metadata table | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $sitemeta; | |
| /** | |
| * Format specifiers for DB columns. Columns not listed here default to %s. Initialized during WP load. | |
| * | |
| * Keys are column names, values are format types: 'ID' => '%d' | |
| * | |
| * @since 2.8.0 | |
| * @see wpdb::prepare() | |
| * @see wpdb::insert() | |
| * @see wpdb::update() | |
| * @see wpdb::delete() | |
| * @see wp_set_wpdb_vars() | |
| * @access public | |
| * @var array | |
| */ | |
| public $field_types = array(); | |
| /** | |
| * Database table columns charset | |
| * | |
| * @since 2.2.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $charset; | |
| /** | |
| * Database table columns collate | |
| * | |
| * @since 2.2.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $collate; | |
| /** | |
| * Database Username | |
| * | |
| * @since 2.9.0 | |
| * @access protected | |
| * @var string | |
| */ | |
| protected $dbuser; | |
| /** | |
| * Database Password | |
| * | |
| * @since 3.1.0 | |
| * @access protected | |
| * @var string | |
| */ | |
| protected $dbpassword; | |
| /** | |
| * Database Name | |
| * | |
| * @since 3.1.0 | |
| * @access protected | |
| * @var string | |
| */ | |
| protected $dbname; | |
| /** | |
| * Database Host | |
| * | |
| * @since 3.1.0 | |
| * @access protected | |
| * @var string | |
| */ | |
| protected $dbhost; | |
| /** | |
| * Database Handle | |
| * | |
| * @since 0.71 | |
| * @access protected | |
| * @var string | |
| */ | |
| protected $dbh; | |
| /** | |
| * A textual description of the last query/get_row/get_var call | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * @var string | |
| */ | |
| public $func_call; | |
| /** | |
| * Whether MySQL is used as the database engine. | |
| * | |
| * Set in WPDB::db_connect() to true, by default. This is used when checking | |
| * against the required MySQL version for WordPress. Normally, a replacement | |
| * database drop-in (db.php) will skip these checks, but setting this to true | |
| * will force the checks to occur. | |
| * | |
| * @since 3.3.0 | |
| * @access public | |
| * @var bool | |
| */ | |
| public $is_mysql = null; | |
| /** | |
| * A list of incompatible SQL modes. | |
| * | |
| * @since 3.9.0 | |
| * @access protected | |
| * @var array | |
| */ | |
| protected $incompatible_modes = array( 'NO_ZERO_DATE', 'ONLY_FULL_GROUP_BY', | |
| 'STRICT_TRANS_TABLES', 'STRICT_ALL_TABLES', 'TRADITIONAL' ); | |
| /** | |
| * Whether to use mysqli over mysql. | |
| * | |
| * @since 3.9.0 | |
| * @access private | |
| * @var bool | |
| */ | |
| private $use_mysqli = false; | |
| /** | |
| * Whether we've managed to successfully connect at some point | |
| * | |
| * @since 3.9.0 | |
| * @access private | |
| * @var bool | |
| */ | |
| private $has_connected = false; | |
| /** | |
| * Connects to the database server and selects a database | |
| * | |
| * PHP5 style constructor for compatibility with PHP5. Does | |
| * the actual setting up of the class properties and connection | |
| * to the database. | |
| * | |
| * @link https://core.trac.wordpress.org/ticket/3354 | |
| * @since 2.0.8 | |
| * | |
| * @global string $wp_version | |
| * | |
| * @param string $dbuser MySQL database user | |
| * @param string $dbpassword MySQL database password | |
| * @param string $dbname MySQL database name | |
| * @param string $dbhost MySQL database host | |
| */ | |
| public function __construct( $dbuser, $dbpassword, $dbname, $dbhost ) { | |
| register_shutdown_function( array( $this, '__destruct' ) ); | |
| if ( WP_DEBUG && WP_DEBUG_DISPLAY ) | |
| $this->show_errors(); | |
| /* Use ext/mysqli if it exists and: | |
| * - WP_USE_EXT_MYSQL is defined as false, or | |
| * - We are a development version of WordPress, or | |
| * - We are running PHP 5.5 or greater, or | |
| * - ext/mysql is not loaded. | |
| */ | |
| if ( function_exists( 'mysqli_connect' ) ) { | |
| if ( defined( 'WP_USE_EXT_MYSQL' ) ) { | |
| $this->use_mysqli = ! WP_USE_EXT_MYSQL; | |
| } elseif ( version_compare( phpversion(), '5.5', '>=' ) || ! function_exists( 'mysql_connect' ) ) { | |
| $this->use_mysqli = true; | |
| } elseif ( false !== strpos( $GLOBALS['wp_version'], '-' ) ) { | |
| $this->use_mysqli = true; | |
| } | |
| } | |
| $this->dbuser = $dbuser; | |
| $this->dbpassword = $dbpassword; | |
| $this->dbname = $dbname; | |
| $this->dbhost = $dbhost; | |
| // wp-config.php creation will manually connect when ready. | |
| if ( defined( 'WP_SETUP_CONFIG' ) ) { | |
| return; | |
| } | |
| $this->db_connect(); | |
| } | |
| /** | |
| * PHP5 style destructor and will run when database object is destroyed. | |
| * | |
| * @see wpdb::__construct() | |
| * @since 2.0.8 | |
| * @return true | |
| */ | |
| public function __destruct() { | |
| return true; | |
| } | |
| /** | |
| * PHP5 style magic getter, used to lazy-load expensive data. | |
| * | |
| * @since 3.5.0 | |
| * | |
| * @param string $name The private member to get, and optionally process | |
| * @return mixed The private member | |
| */ | |
| public function __get( $name ) { | |
| if ( 'col_info' === $name ) | |
| $this->load_col_info(); | |
| return $this->$name; | |
| } | |
| /** | |
| * Magic function, for backwards compatibility. | |
| * | |
| * @since 3.5.0 | |
| * | |
| * @param string $name The private member to set | |
| * @param mixed $value The value to set | |
| */ | |
| public function __set( $name, $value ) { | |
| $protected_members = array( | |
| 'col_meta', | |
| 'table_charset', | |
| 'check_current_query', | |
| ); | |
| if ( in_array( $name, $protected_members, true ) ) { | |
| return; | |
| } | |
| $this->$name = $value; | |
| } | |
| /** | |
| * Magic function, for backwards compatibility. | |
| * | |
| * @since 3.5.0 | |
| * | |
| * @param string $name The private member to check | |
| * | |
| * @return bool If the member is set or not | |
| */ | |
| public function __isset( $name ) { | |
| return isset( $this->$name ); | |
| } | |
| /** | |
| * Magic function, for backwards compatibility. | |
| * | |
| * @since 3.5.0 | |
| * | |
| * @param string $name The private member to unset | |
| */ | |
| public function __unset( $name ) { | |
| unset( $this->$name ); | |
| } | |
| /** | |
| * Set $this->charset and $this->collate | |
| * | |
| * @since 3.1.0 | |
| */ | |
| public function init_charset() { | |
| if ( function_exists('is_multisite') && is_multisite() ) { | |
| $this->charset = 'utf8'; | |
| if ( defined( 'DB_COLLATE' ) && DB_COLLATE ) { | |
| $this->collate = DB_COLLATE; | |
| } else { | |
| $this->collate = 'utf8_general_ci'; | |
| } | |
| } elseif ( defined( 'DB_COLLATE' ) ) { | |
| $this->collate = DB_COLLATE; | |
| } | |
| if ( defined( 'DB_CHARSET' ) ) { | |
| $this->charset = DB_CHARSET; | |
| } | |
| if ( ( $this->use_mysqli && ! ( $this->dbh instanceof mysqli ) ) || empty( $this->dbh ) ) { | |
| return; | |
| } | |
| if ( 'utf8' === $this->charset && $this->has_cap( 'utf8mb4' ) ) { | |
| $this->charset = 'utf8mb4'; | |
| } | |
| if ( 'utf8mb4' === $this->charset && ( ! $this->collate || stripos( $this->collate, 'utf8_' ) === 0 ) ) { | |
| $this->collate = 'utf8mb4_unicode_ci'; | |
| } | |
| } | |
| /** | |
| * Sets the connection's character set. | |
| * | |
| * @since 3.1.0 | |
| * | |
| * @param resource $dbh The resource given by mysql_connect | |
| * @param string $charset Optional. The character set. Default null. | |
| * @param string $collate Optional. The collation. Default null. | |
| */ | |
| public function set_charset( $dbh, $charset = null, $collate = null ) { | |
| if ( ! isset( $charset ) ) | |
| $charset = $this->charset; | |
| if ( ! isset( $collate ) ) | |
| $collate = $this->collate; | |
| if ( $this->has_cap( 'collation' ) && ! empty( $charset ) ) { | |
| if ( $this->use_mysqli ) { | |
| if ( function_exists( 'mysqli_set_charset' ) && $this->has_cap( 'set_charset' ) ) { | |
| mysqli_set_charset( $dbh, $charset ); | |
| } else { | |
| $query = $this->prepare( 'SET NAMES %s', $charset ); | |
| if ( ! empty( $collate ) ) | |
| $query .= $this->prepare( ' COLLATE %s', $collate ); | |
| mysqli_query( $dbh, $query ); | |
| } | |
| } else { | |
| if ( function_exists( 'mysql_set_charset' ) && $this->has_cap( 'set_charset' ) ) { | |
| mysql_set_charset( $charset, $dbh ); | |
| } else { | |
| $query = $this->prepare( 'SET NAMES %s', $charset ); | |
| if ( ! empty( $collate ) ) | |
| $query .= $this->prepare( ' COLLATE %s', $collate ); | |
| mysql_query( $query, $dbh ); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Change the current SQL mode, and ensure its WordPress compatibility. | |
| * | |
| * If no modes are passed, it will ensure the current MySQL server | |
| * modes are compatible. | |
| * | |
| * @since 3.9.0 | |
| * | |
| * @param array $modes Optional. A list of SQL modes to set. | |
| */ | |
| public function set_sql_mode( $modes = array() ) { | |
| if ( empty( $modes ) ) { | |
| if ( $this->use_mysqli ) { | |
| $res = mysqli_query( $this->dbh, 'SELECT @@SESSION.sql_mode' ); | |
| } else { | |
| $res = mysql_query( 'SELECT @@SESSION.sql_mode', $this->dbh ); | |
| } | |
| if ( empty( $res ) ) { | |
| return; | |
| } | |
| if ( $this->use_mysqli ) { | |
| $modes_array = mysqli_fetch_array( $res ); | |
| if ( empty( $modes_array[0] ) ) { | |
| return; | |
| } | |
| $modes_str = $modes_array[0]; | |
| } else { | |
| $modes_str = mysql_result( $res, 0 ); | |
| } | |
| if ( empty( $modes_str ) ) { | |
| return; | |
| } | |
| $modes = explode( ',', $modes_str ); | |
| } | |
| $modes = array_change_key_case( $modes, CASE_UPPER ); | |
| /** | |
| * Filter the list of incompatible SQL modes to exclude. | |
| * | |
| * @since 3.9.0 | |
| * | |
| * @param array $incompatible_modes An array of incompatible modes. | |
| */ | |
| $incompatible_modes = (array) apply_filters( 'incompatible_sql_modes', $this->incompatible_modes ); | |
| foreach ( $modes as $i => $mode ) { | |
| if ( in_array( $mode, $incompatible_modes ) ) { | |
| unset( $modes[ $i ] ); | |
| } | |
| } | |
| $modes_str = implode( ',', $modes ); | |
| if ( $this->use_mysqli ) { | |
| mysqli_query( $this->dbh, "SET SESSION sql_mode='$modes_str'" ); | |
| } else { | |
| mysql_query( "SET SESSION sql_mode='$modes_str'", $this->dbh ); | |
| } | |
| } | |
| /** | |
| * Sets the table prefix for the WordPress tables. | |
| * | |
| * @since 2.5.0 | |
| * | |
| * @param string $prefix Alphanumeric name for the new prefix. | |
| * @param bool $set_table_names Optional. Whether the table names, e.g. wpdb::$posts, should be updated or not. | |
| * @return string|WP_Error Old prefix or WP_Error on error | |
| */ | |
| public function set_prefix( $prefix, $set_table_names = true ) { | |
| if ( preg_match( '|[^a-z0-9_]|i', $prefix ) ) | |
| return new WP_Error('invalid_db_prefix', 'Invalid database prefix' ); | |
| $old_prefix = is_multisite() ? '' : $prefix; | |
| if ( isset( $this->base_prefix ) ) | |
| $old_prefix = $this->base_prefix; | |
| $this->base_prefix = $prefix; | |
| if ( $set_table_names ) { | |
| foreach ( $this->tables( 'global' ) as $table => $prefixed_table ) | |
| $this->$table = $prefixed_table; | |
| if ( is_multisite() && empty( $this->blogid ) ) | |
| return $old_prefix; | |
| $this->prefix = $this->get_blog_prefix(); | |
| foreach ( $this->tables( 'blog' ) as $table => $prefixed_table ) | |
| $this->$table = $prefixed_table; | |
| foreach ( $this->tables( 'old' ) as $table => $prefixed_table ) | |
| $this->$table = $prefixed_table; | |
| } | |
| return $old_prefix; | |
| } | |
| /** | |
| * Sets blog id. | |
| * | |
| * @since 3.0.0 | |
| * @access public | |
| * | |
| * @param int $blog_id | |
| * @param int $site_id Optional. | |
| * @return int previous blog id | |
| */ | |
| public function set_blog_id( $blog_id, $site_id = 0 ) { | |
| if ( ! empty( $site_id ) ) | |
| $this->siteid = $site_id; | |
| $old_blog_id = $this->blogid; | |
| $this->blogid = $blog_id; | |
| $this->prefix = $this->get_blog_prefix(); | |
| foreach ( $this->tables( 'blog' ) as $table => $prefixed_table ) | |
| $this->$table = $prefixed_table; | |
| foreach ( $this->tables( 'old' ) as $table => $prefixed_table ) | |
| $this->$table = $prefixed_table; | |
| return $old_blog_id; | |
| } | |
| /** | |
| * Gets blog prefix. | |
| * | |
| * @since 3.0.0 | |
| * @param int $blog_id Optional. | |
| * @return string Blog prefix. | |
| */ | |
| public function get_blog_prefix( $blog_id = null ) { | |
| if ( is_multisite() ) { | |
| if ( null === $blog_id ) | |
| $blog_id = $this->blogid; | |
| $blog_id = (int) $blog_id; | |
| if ( defined( 'MULTISITE' ) && ( 0 == $blog_id || 1 == $blog_id ) ) | |
| return $this->base_prefix; | |
| else | |
| return $this->base_prefix . $blog_id . '_'; | |
| } else { | |
| return $this->base_prefix; | |
| } | |
| } | |
| /** | |
| * Returns an array of WordPress tables. | |
| * | |
| * Also allows for the CUSTOM_USER_TABLE and CUSTOM_USER_META_TABLE to | |
| * override the WordPress users and usermeta tables that would otherwise | |
| * be determined by the prefix. | |
| * | |
| * The scope argument can take one of the following: | |
| * | |
| * 'all' - returns 'all' and 'global' tables. No old tables are returned. | |
| * 'blog' - returns the blog-level tables for the queried blog. | |
| * 'global' - returns the global tables for the installation, returning multisite tables only if running multisite. | |
| * 'ms_global' - returns the multisite global tables, regardless if current installation is multisite. | |
| * 'old' - returns tables which are deprecated. | |
| * | |
| * @since 3.0.0 | |
| * @uses wpdb::$tables | |
| * @uses wpdb::$old_tables | |
| * @uses wpdb::$global_tables | |
| * @uses wpdb::$ms_global_tables | |
| * | |
| * @param string $scope Optional. Can be all, global, ms_global, blog, or old tables. Defaults to all. | |
| * @param bool $prefix Optional. Whether to include table prefixes. Default true. If blog | |
| * prefix is requested, then the custom users and usermeta tables will be mapped. | |
| * @param int $blog_id Optional. The blog_id to prefix. Defaults to wpdb::$blogid. Used only when prefix is requested. | |
| * @return array Table names. When a prefix is requested, the key is the unprefixed table name. | |
| */ | |
| public function tables( $scope = 'all', $prefix = true, $blog_id = 0 ) { | |
| switch ( $scope ) { | |
| case 'all' : | |
| $tables = array_merge( $this->global_tables, $this->tables ); | |
| if ( is_multisite() ) | |
| $tables = array_merge( $tables, $this->ms_global_tables ); | |
| break; | |
| case 'blog' : | |
| $tables = $this->tables; | |
| break; | |
| case 'global' : | |
| $tables = $this->global_tables; | |
| if ( is_multisite() ) | |
| $tables = array_merge( $tables, $this->ms_global_tables ); | |
| break; | |
| case 'ms_global' : | |
| $tables = $this->ms_global_tables; | |
| break; | |
| case 'old' : | |
| $tables = $this->old_tables; | |
| break; | |
| default : | |
| return array(); | |
| } | |
| if ( $prefix ) { | |
| if ( ! $blog_id ) | |
| $blog_id = $this->blogid; | |
| $blog_prefix = $this->get_blog_prefix( $blog_id ); | |
| $base_prefix = $this->base_prefix; | |
| $global_tables = array_merge( $this->global_tables, $this->ms_global_tables ); | |
| foreach ( $tables as $k => $table ) { | |
| if ( in_array( $table, $global_tables ) ) | |
| $tables[ $table ] = $base_prefix . $table; | |
| else | |
| $tables[ $table ] = $blog_prefix . $table; | |
| unset( $tables[ $k ] ); | |
| } | |
| if ( isset( $tables['users'] ) && defined( 'CUSTOM_USER_TABLE' ) ) | |
| $tables['users'] = CUSTOM_USER_TABLE; | |
| if ( isset( $tables['usermeta'] ) && defined( 'CUSTOM_USER_META_TABLE' ) ) | |
| $tables['usermeta'] = CUSTOM_USER_META_TABLE; | |
| } | |
| return $tables; | |
| } | |
| /** | |
| * Selects a database using the current database connection. | |
| * | |
| * The database name will be changed based on the current database | |
| * connection. On failure, the execution will bail and display an DB error. | |
| * | |
| * @since 0.71 | |
| * | |
| * @param string $db MySQL database name | |
| * @param resource|null $dbh Optional link identifier. | |
| */ | |
| public function select( $db, $dbh = null ) { | |
| if ( is_null($dbh) ) | |
| $dbh = $this->dbh; | |
| if ( $this->use_mysqli ) { | |
| $success = @mysqli_select_db( $dbh, $db ); | |
| } else { | |
| $success = @mysql_select_db( $db, $dbh ); | |
| } | |
| if ( ! $success ) { | |
| $this->ready = false; | |
| if ( ! did_action( 'template_redirect' ) ) { | |
| wp_load_translations_early(); | |
| $message = '<h1>' . __( 'Can’t select database' ) . "</h1>\n"; | |
| $message .= '<p>' . sprintf( | |
| /* translators: %s: database name */ | |
| __( 'We were able to connect to the database server (which means your username and password is okay) but not able to select the %s database.' ), | |
| '<code>' . htmlspecialchars( $db, ENT_QUOTES ) . '</code>' | |
| ) . "</p>\n"; | |
| $message .= "<ul>\n"; | |
| $message .= '<li>' . __( 'Are you sure it exists?' ) . "</li>\n"; | |
| $message .= '<li>' . sprintf( | |
| /* translators: 1: database user, 2: database name */ | |
| __( 'Does the user %1$s have permission to use the %2$s database?' ), | |
| '<code>' . htmlspecialchars( $this->dbuser, ENT_QUOTES ) . '</code>', | |
| '<code>' . htmlspecialchars( $db, ENT_QUOTES ) . '</code>' | |
| ) . "</li>\n"; | |
| $message .= '<li>' . sprintf( | |
| /* translators: %s: database name */ | |
| __( 'On some systems the name of your database is prefixed with your username, so it would be like <code>username_%1$s</code>. Could that be the problem?' ), | |
| htmlspecialchars( $db, ENT_QUOTES ) | |
| ). "</li>\n"; | |
| $message .= "</ul>\n"; | |
| $message .= '<p>' . sprintf( | |
| /* translators: %s: support forums URL */ | |
| __( 'If you don’t know how to set up a database you should <strong>contact your host</strong>. If all else fails you may find help at the <a href="%s">WordPress Support Forums</a>.' ), | |
| __( 'https://wordpress.org/support/' ) | |
| ) . "</p>\n"; | |
| $this->bail( $message, 'db_select_fail' ); | |
| } | |
| } | |
| } | |
| /** | |
| * Do not use, deprecated. | |
| * | |
| * Use esc_sql() or wpdb::prepare() instead. | |
| * | |
| * @since 2.8.0 | |
| * @deprecated 3.6.0 Use wpdb::prepare() | |
| * @see wpdb::prepare | |
| * @see esc_sql() | |
| * @access private | |
| * | |
| * @param string $string | |
| * @return string | |
| */ | |
| function _weak_escape( $string ) { | |
| if ( func_num_args() === 1 && function_exists( '_deprecated_function' ) ) | |
| _deprecated_function( __METHOD__, '3.6', 'wpdb::prepare() or esc_sql()' ); | |
| return addslashes( $string ); | |
| } | |
| /** | |
| * Real escape, using mysqli_real_escape_string() or mysql_real_escape_string() | |
| * | |
| * @see mysqli_real_escape_string() | |
| * @see mysql_real_escape_string() | |
| * @since 2.8.0 | |
| * @access private | |
| * | |
| * @param string $string to escape | |
| * @return string escaped | |
| */ | |
| function _real_escape( $string ) { | |
| if ( $this->dbh ) { | |
| if ( $this->use_mysqli ) { | |
| return mysqli_real_escape_string( $this->dbh, $string ); | |
| } else { | |
| return mysql_real_escape_string( $string, $this->dbh ); | |
| } | |
| } | |
| $class = get_class( $this ); | |
| if ( function_exists( '__' ) ) { | |
| /* translators: %s: database access abstraction class, usually wpdb or a class extending wpdb */ | |
| _doing_it_wrong( $class, sprintf( __( '%s must set a database connection for use with escaping.' ), $class ), E_USER_NOTICE ); | |
| } else { | |
| _doing_it_wrong( $class, sprintf( '%s must set a database connection for use with escaping.', $class ), E_USER_NOTICE ); | |
| } | |
| return addslashes( $string ); | |
| } | |
| /** | |
| * Escape data. Works on arrays. | |
| * | |
| * @uses wpdb::_real_escape() | |
| * @since 2.8.0 | |
| * @access private | |
| * | |
| * @param string|array $data | |
| * @return string|array escaped | |
| */ | |
| function _escape( $data ) { | |
| if ( is_array( $data ) ) { | |
| foreach ( $data as $k => $v ) { | |
| if ( is_array($v) ) | |
| $data[$k] = $this->_escape( $v ); | |
| else | |
| $data[$k] = $this->_real_escape( $v ); | |
| } | |
| } else { | |
| $data = $this->_real_escape( $data ); | |
| } | |
| return $data; | |
| } | |
| /** | |
| * Do not use, deprecated. | |
| * | |
| * Use esc_sql() or wpdb::prepare() instead. | |
| * | |
| * @since 0.71 | |
| * @deprecated 3.6.0 Use wpdb::prepare() | |
| * @see wpdb::prepare() | |
| * @see esc_sql() | |
| * | |
| * @param mixed $data | |
| * @return mixed | |
| */ | |
| public function escape( $data ) { | |
| if ( func_num_args() === 1 && function_exists( '_deprecated_function' ) ) | |
| _deprecated_function( __METHOD__, '3.6', 'wpdb::prepare() or esc_sql()' ); | |
| if ( is_array( $data ) ) { | |
| foreach ( $data as $k => $v ) { | |
| if ( is_array( $v ) ) | |
| $data[$k] = $this->escape( $v, 'recursive' ); | |
| else | |
| $data[$k] = $this->_weak_escape( $v, 'internal' ); | |
| } | |
| } else { | |
| $data = $this->_weak_escape( $data, 'internal' ); | |
| } | |
| return $data; | |
| } | |
| /** | |
| * Escapes content by reference for insertion into the database, for security | |
| * | |
| * @uses wpdb::_real_escape() | |
| * | |
| * @since 2.3.0 | |
| * | |
| * @param string $string to escape | |
| */ | |
| public function escape_by_ref( &$string ) { | |
| if ( ! is_float( $string ) ) | |
| $string = $this->_real_escape( $string ); | |
| } | |
| /** | |
| * Prepares a SQL query for safe execution. Uses sprintf()-like syntax. | |
| * | |
| * The following directives can be used in the query format string: | |
| * %d (integer) | |
| * %f (float) | |
| * %s (string) | |
| * %% (literal percentage sign - no argument needed) | |
| * | |
| * All of %d, %f, and %s are to be left unquoted in the query string and they need an argument passed for them. | |
| * Literals (%) as parts of the query must be properly written as %%. | |
| * | |
| * This function only supports a small subset of the sprintf syntax; it only supports %d (integer), %f (float), and %s (string). | |
| * Does not support sign, padding, alignment, width or precision specifiers. | |
| * Does not support argument numbering/swapping. | |
| * | |
| * May be called like {@link http://php.net/sprintf sprintf()} or like {@link http://php.net/vsprintf vsprintf()}. | |
| * | |
| * Both %d and %s should be left unquoted in the query string. | |
| * | |
| * wpdb::prepare( "SELECT * FROM `table` WHERE `column` = %s AND `field` = %d", 'foo', 1337 ) | |
| * wpdb::prepare( "SELECT DATE_FORMAT(`field`, '%%c') FROM `table` WHERE `column` = %s", 'foo' ); | |
| * | |
| * @link http://php.net/sprintf Description of syntax. | |
| * @since 2.3.0 | |
| * | |
| * @param string $query Query statement with sprintf()-like placeholders | |
| * @param array|mixed $args The array of variables to substitute into the query's placeholders if being called like | |
| * {@link http://php.net/vsprintf vsprintf()}, or the first variable to substitute into the query's placeholders if | |
| * being called like {@link http://php.net/sprintf sprintf()}. | |
| * @param mixed $args,... further variables to substitute into the query's placeholders if being called like | |
| * {@link http://php.net/sprintf sprintf()}. | |
| * @return string|void Sanitized query string, if there is a query to prepare. | |
| */ | |
| public function prepare( $query, $args ) { | |
| if ( is_null( $query ) ) | |
| return; | |
| // This is not meant to be foolproof -- but it will catch obviously incorrect usage. | |
| if ( strpos( $query, '%' ) === false ) { | |
| _doing_it_wrong( 'wpdb::prepare', sprintf( __( 'The query argument of %s must have a placeholder.' ), 'wpdb::prepare()' ), '3.9' ); | |
| } | |
| $args = func_get_args(); | |
| array_shift( $args ); | |
| // If args were passed as an array (as in vsprintf), move them up | |
| if ( isset( $args[0] ) && is_array($args[0]) ) | |
| $args = $args[0]; | |
| $query = str_replace( "'%s'", '%s', $query ); // in case someone mistakenly already singlequoted it | |
| $query = str_replace( '"%s"', '%s', $query ); // doublequote unquoting | |
| $query = preg_replace( '|(?<!%)%f|' , '%F', $query ); // Force floats to be locale unaware | |
| $query = preg_replace( '|(?<!%)%s|', "'%s'", $query ); // quote the strings, avoiding escaped strings like %%s | |
| array_walk( $args, array( $this, 'escape_by_ref' ) ); | |
| return @vsprintf( $query, $args ); | |
| } | |
| /** | |
| * First half of escaping for LIKE special characters % and _ before preparing for MySQL. | |
| * | |
| * Use this only before wpdb::prepare() or esc_sql(). Reversing the order is very bad for security. | |
| * | |
| * Example Prepared Statement: | |
| * $wild = '%'; | |
| * $find = 'only 43% of planets'; | |
| * $like = $wild . $wpdb->esc_like( $find ) . $wild; | |
| * $sql = $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE post_content LIKE %s", $like ); | |
| * | |
| * Example Escape Chain: | |
| * $sql = esc_sql( $wpdb->esc_like( $input ) ); | |
| * | |
| * @since 4.0.0 | |
| * @access public | |
| * | |
| * @param string $text The raw text to be escaped. The input typed by the user should have no | |
| * extra or deleted slashes. | |
| * @return string Text in the form of a LIKE phrase. The output is not SQL safe. Call $wpdb::prepare() | |
| * or real_escape next. | |
| */ | |
| public function esc_like( $text ) { | |
| return addcslashes( $text, '_%\\' ); | |
| } | |
| /** | |
| * Print SQL/DB error. | |
| * | |
| * @since 0.71 | |
| * @global array $EZSQL_ERROR Stores error information of query and error string | |
| * | |
| * @param string $str The error to display | |
| * @return false|void False if the showing of errors is disabled. | |
| */ | |
| public function print_error( $str = '' ) { | |
| global $EZSQL_ERROR; | |
| if ( !$str ) { | |
| if ( $this->use_mysqli ) { | |
| $str = mysqli_error( $this->dbh ); | |
| } else { | |
| $str = mysql_error( $this->dbh ); | |
| } | |
| } | |
| $EZSQL_ERROR[] = array( 'query' => $this->last_query, 'error_str' => $str ); | |
| if ( $this->suppress_errors ) | |
| return false; | |
| wp_load_translations_early(); | |
| if ( $caller = $this->get_caller() ) | |
| $error_str = sprintf( __( 'WordPress database error %1$s for query %2$s made by %3$s' ), $str, $this->last_query, $caller ); | |
| else | |
| $error_str = sprintf( __( 'WordPress database error %1$s for query %2$s' ), $str, $this->last_query ); | |
| error_log( $error_str ); | |
| // Are we showing errors? | |
| if ( ! $this->show_errors ) | |
| return false; | |
| // If there is an error then take note of it | |
| if ( is_multisite() ) { | |
| $msg = sprintf( | |
| "%s [%s]\n%s\n", | |
| __( 'WordPress database error:' ), | |
| $str, | |
| $this->last_query | |
| ); | |
| if ( defined( 'ERRORLOGFILE' ) ) { | |
| error_log( $msg, 3, ERRORLOGFILE ); | |
| } | |
| if ( defined( 'DIEONDBERROR' ) ) { | |
| wp_die( $msg ); | |
| } | |
| } else { | |
| $str = htmlspecialchars( $str, ENT_QUOTES ); | |
| $query = htmlspecialchars( $this->last_query, ENT_QUOTES ); | |
| printf( | |
| '<div id="error"><p class="wpdberror"><strong>%s</strong> [%s]<br /><code>%s</code></p></div>', | |
| __( 'WordPress database error:' ), | |
| $str, | |
| $query | |
| ); | |
| } | |
| } | |
| /** | |
| * Enables showing of database errors. | |
| * | |
| * This function should be used only to enable showing of errors. | |
| * wpdb::hide_errors() should be used instead for hiding of errors. However, | |
| * this function can be used to enable and disable showing of database | |
| * errors. | |
| * | |
| * @since 0.71 | |
| * @see wpdb::hide_errors() | |
| * | |
| * @param bool $show Whether to show or hide errors | |
| * @return bool Old value for showing errors. | |
| */ | |
| public function show_errors( $show = true ) { | |
| $errors = $this->show_errors; | |
| $this->show_errors = $show; | |
| return $errors; | |
| } | |
| /** | |
| * Disables showing of database errors. | |
| * | |
| * By default database errors are not shown. | |
| * | |
| * @since 0.71 | |
| * @see wpdb::show_errors() | |
| * | |
| * @return bool Whether showing of errors was active | |
| */ | |
| public function hide_errors() { | |
| $show = $this->show_errors; | |
| $this->show_errors = false; | |
| return $show; | |
| } | |
| /** | |
| * Whether to suppress database errors. | |
| * | |
| * By default database errors are suppressed, with a simple | |
| * call to this function they can be enabled. | |
| * | |
| * @since 2.5.0 | |
| * @see wpdb::hide_errors() | |
| * @param bool $suppress Optional. New value. Defaults to true. | |
| * @return bool Old value | |
| */ | |
| public function suppress_errors( $suppress = true ) { | |
| $errors = $this->suppress_errors; | |
| $this->suppress_errors = (bool) $suppress; | |
| return $errors; | |
| } | |
| /** | |
| * Kill cached query results. | |
| * | |
| * @since 0.71 | |
| */ | |
| public function flush() { | |
| $this->last_result = array(); | |
| $this->col_info = null; | |
| $this->last_query = null; | |
| $this->rows_affected = $this->num_rows = 0; | |
| $this->last_error = ''; | |
| if ( $this->use_mysqli && $this->result instanceof mysqli_result ) { | |
| mysqli_free_result( $this->result ); | |
| $this->result = null; | |
| // Sanity check before using the handle | |
| if ( empty( $this->dbh ) || !( $this->dbh instanceof mysqli ) ) { | |
| return; | |
| } | |
| // Clear out any results from a multi-query | |
| while ( mysqli_more_results( $this->dbh ) ) { | |
| mysqli_next_result( $this->dbh ); | |
| } | |
| } elseif ( is_resource( $this->result ) ) { | |
| mysql_free_result( $this->result ); | |
| } | |
| } | |
| /** | |
| * Connect to and select database. | |
| * | |
| * If $allow_bail is false, the lack of database connection will need | |
| * to be handled manually. | |
| * | |
| * @since 3.0.0 | |
| * @since 3.9.0 $allow_bail parameter added. | |
| * | |
| * @param bool $allow_bail Optional. Allows the function to bail. Default true. | |
| * @return bool True with a successful connection, false on failure. | |
| */ | |
| public function db_connect( $allow_bail = true ) { | |
| $this->is_mysql = true; | |
| /* | |
| * Deprecated in 3.9+ when using MySQLi. No equivalent | |
| * $new_link parameter exists for mysqli_* functions. | |
| */ | |
| $new_link = defined( 'MYSQL_NEW_LINK' ) ? MYSQL_NEW_LINK : true; | |
| $client_flags = defined( 'MYSQL_CLIENT_FLAGS' ) ? MYSQL_CLIENT_FLAGS : 0; | |
| if ( $this->use_mysqli ) { | |
| $this->dbh = mysqli_init(); | |
| // mysqli_real_connect doesn't support the host param including a port or socket | |
| // like mysql_connect does. This duplicates how mysql_connect detects a port and/or socket file. | |
| $port = null; | |
| $socket = null; | |
| $host = $this->dbhost; | |
| $port_or_socket = strstr( $host, ':' ); | |
| if ( ! empty( $port_or_socket ) ) { | |
| $host = substr( $host, 0, strpos( $host, ':' ) ); | |
| $port_or_socket = substr( $port_or_socket, 1 ); | |
| if ( 0 !== strpos( $port_or_socket, '/' ) ) { | |
| $port = intval( $port_or_socket ); | |
| $maybe_socket = strstr( $port_or_socket, ':' ); | |
| if ( ! empty( $maybe_socket ) ) { | |
| $socket = substr( $maybe_socket, 1 ); | |
| } | |
| } else { | |
| $socket = $port_or_socket; | |
| } | |
| } | |
| if ( WP_DEBUG ) { | |
| mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags ); | |
| } else { | |
| @mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags ); | |
| } | |
| if ( $this->dbh->connect_errno ) { | |
| $this->dbh = null; | |
| /* It's possible ext/mysqli is misconfigured. Fall back to ext/mysql if: | |
| * - We haven't previously connected, and | |
| * - WP_USE_EXT_MYSQL isn't set to false, and | |
| * - ext/mysql is loaded. | |
| */ | |
| $attempt_fallback = true; | |
| if ( $this->has_connected ) { | |
| $attempt_fallback = false; | |
| } elseif ( defined( 'WP_USE_EXT_MYSQL' ) && ! WP_USE_EXT_MYSQL ) { | |
| $attempt_fallback = false; | |
| } elseif ( ! function_exists( 'mysql_connect' ) ) { | |
| $attempt_fallback = false; | |
| } | |
| if ( $attempt_fallback ) { | |
| $this->use_mysqli = false; | |
| return $this->db_connect( $allow_bail ); | |
| } | |
| } | |
| } else { | |
| if ( WP_DEBUG ) { | |
| $this->dbh = mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags ); | |
| } else { | |
| $this->dbh = @mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags ); | |
| } | |
| } | |
| if ( ! $this->dbh && $allow_bail ) { | |
| wp_load_translations_early(); | |
| // Load custom DB error template, if present. | |
| if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) { | |
| require_once( WP_CONTENT_DIR . '/db-error.php' ); | |
| die(); | |
| } | |
| $message = '<h1>' . __( 'Error establishing a database connection' ) . "</h1>\n"; | |
| $message .= '<p>' . sprintf( | |
| /* translators: 1: wp-config.php. 2: database host */ | |
| __( 'This either means that the username and password information in your %1$s file is incorrect or we can’t contact the database server at %2$s. This could mean your host’s database server is down.' ), | |
| '<code>wp-config.php</code>', | |
| '<code>' . htmlspecialchars( $this->dbhost, ENT_QUOTES ) . '</code>' | |
| ) . "</p>\n"; | |
| $message .= "<ul>\n"; | |
| $message .= '<li>' . __( 'Are you sure you have the correct username and password?' ) . "</li>\n"; | |
| $message .= '<li>' . __( 'Are you sure that you have typed the correct hostname?' ) . "</li>\n"; | |
| $message .= '<li>' . __( 'Are you sure that the database server is running?' ) . "</li>\n"; | |
| $message .= "</ul>\n"; | |
| $message .= '<p>' . sprintf( | |
| /* translators: %s: support forums URL */ | |
| __( 'If you’re unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href="%s">WordPress Support Forums</a>.' ), | |
| __( 'https://wordpress.org/support/' ) | |
| ) . "</p>\n"; | |
| $this->bail( $message, 'db_connect_fail' ); | |
| return false; | |
| } elseif ( $this->dbh ) { | |
| if ( ! $this->has_connected ) { | |
| $this->init_charset(); | |
| } | |
| $this->has_connected = true; | |
| $this->set_charset( $this->dbh ); | |
| $this->ready = true; | |
| $this->set_sql_mode(); | |
| $this->select( $this->dbname, $this->dbh ); | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Check that the connection to the database is still up. If not, try to reconnect. | |
| * | |
| * If this function is unable to reconnect, it will forcibly die, or if after the | |
| * the template_redirect hook has been fired, return false instead. | |
| * | |
| * If $allow_bail is false, the lack of database connection will need | |
| * to be handled manually. | |
| * | |
| * @since 3.9.0 | |
| * | |
| * @param bool $allow_bail Optional. Allows the function to bail. Default true. | |
| * @return bool|void True if the connection is up. | |
| */ | |
| public function check_connection( $allow_bail = true ) { | |
| if ( $this->use_mysqli ) { | |
| if ( @mysqli_ping( $this->dbh ) ) { | |
| return true; | |
| } | |
| } else { | |
| if ( @mysql_ping( $this->dbh ) ) { | |
| return true; | |
| } | |
| } | |
| $error_reporting = false; | |
| // Disable warnings, as we don't want to see a multitude of "unable to connect" messages | |
| if ( WP_DEBUG ) { | |
| $error_reporting = error_reporting(); | |
| error_reporting( $error_reporting & ~E_WARNING ); | |
| } | |
| for ( $tries = 1; $tries <= $this->reconnect_retries; $tries++ ) { | |
| // On the last try, re-enable warnings. We want to see a single instance of the | |
| // "unable to connect" message on the bail() screen, if it appears. | |
| if ( $this->reconnect_retries === $tries && WP_DEBUG ) { | |
| error_reporting( $error_reporting ); | |
| } | |
| if ( $this->db_connect( false ) ) { | |
| if ( $error_reporting ) { | |
| error_reporting( $error_reporting ); | |
| } | |
| return true; | |
| } | |
| sleep( 1 ); | |
| } | |
| // If template_redirect has already happened, it's too late for wp_die()/dead_db(). | |
| // Let's just return and hope for the best. | |
| if ( did_action( 'template_redirect' ) ) { | |
| return false; | |
| } | |
| if ( ! $allow_bail ) { | |
| return false; | |
| } | |
| wp_load_translations_early(); | |
| $message = '<h1>' . __( 'Error reconnecting to the database' ) . "</h1>\n"; | |
| $message .= '<p>' . sprintf( | |
| /* translators: %s: database host */ | |
| __( 'This means that we lost contact with the database server at %s. This could mean your host’s database server is down.' ), | |
| '<code>' . htmlspecialchars( $this->dbhost, ENT_QUOTES ) . '</code>' | |
| ) . "</p>\n"; | |
| $message .= "<ul>\n"; | |
| $message .= '<li>' . __( 'Are you sure that the database server is running?' ) . "</li>\n"; | |
| $message .= '<li>' . __( 'Are you sure that the database server is not under particularly heavy load?' ) . "</li>\n"; | |
| $message .= "</ul>\n"; | |
| $message .= '<p>' . sprintf( | |
| /* translators: %s: support forums URL */ | |
| __( 'If you’re unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href="%s">WordPress Support Forums</a>.' ), | |
| __( 'https://wordpress.org/support/' ) | |
| ) . "</p>\n"; | |
| // We weren't able to reconnect, so we better bail. | |
| $this->bail( $message, 'db_connect_fail' ); | |
| // Call dead_db() if bail didn't die, because this database is no more. It has ceased to be (at least temporarily). | |
| dead_db(); | |
| } | |
| /** | |
| * Perform a MySQL database query, using current database connection. | |
| * | |
| * More information can be found on the codex page. | |
| * | |
| * @since 0.71 | |
| * | |
| * @param string $query Database query | |
| * @return int|false Number of rows affected/selected or false on error | |
| */ | |
| public function query( $query ) { | |
| if ( ! $this->ready ) { | |
| $this->check_current_query = true; | |
| return false; | |
| } | |
| /** | |
| * Filter the database query. | |
| * | |
| * Some queries are made before the plugins have been loaded, | |
| * and thus cannot be filtered with this method. | |
| * | |
| * @since 2.1.0 | |
| * | |
| * @param string $query Database query. | |
| */ | |
| $query = apply_filters( 'query', $query ); | |
| $this->flush(); | |
| // Log how the function was called | |
| $this->func_call = "\$db->query(\"$query\")"; | |
| // If we're writing to the database, make sure the query will write safely. | |
| if ( $this->check_current_query && ! $this->check_ascii( $query ) ) { | |
| $stripped_query = $this->strip_invalid_text_from_query( $query ); | |
| // strip_invalid_text_from_query() can perform queries, so we need | |
| // to flush again, just to make sure everything is clear. | |
| $this->flush(); | |
| if ( $stripped_query !== $query ) { | |
| $this->insert_id = 0; | |
| return false; | |
| } | |
| } | |
| $this->check_current_query = true; | |
| // Keep track of the last query for debug.. | |
| $this->last_query = $query; | |
| $this->_do_query( $query ); | |
| // MySQL server has gone away, try to reconnect | |
| $mysql_errno = 0; | |
| if ( ! empty( $this->dbh ) ) { | |
| if ( $this->use_mysqli ) { | |
| $mysql_errno = mysqli_errno( $this->dbh ); | |
| } else { | |
| $mysql_errno = mysql_errno( $this->dbh ); | |
| } | |
| } | |
| if ( empty( $this->dbh ) || 2006 == $mysql_errno ) { | |
| if ( $this->check_connection() ) { | |
| $this->_do_query( $query ); | |
| } else { | |
| $this->insert_id = 0; | |
| return false; | |
| } | |
| } | |
| // If there is an error then take note of it.. | |
| if ( $this->use_mysqli ) { | |
| $this->last_error = mysqli_error( $this->dbh ); | |
| } else { | |
| $this->last_error = mysql_error( $this->dbh ); | |
| } | |
| if ( $this->last_error ) { | |
| // Clear insert_id on a subsequent failed insert. | |
| if ( $this->insert_id && preg_match( '/^\s*(insert|replace)\s/i', $query ) ) | |
| $this->insert_id = 0; | |
| $this->print_error(); | |
| return false; | |
| } | |
| if ( preg_match( '/^\s*(create|alter|truncate|drop)\s/i', $query ) ) { | |
| $return_val = $this->result; | |
| } elseif ( preg_match( '/^\s*(insert|delete|update|replace)\s/i', $query ) ) { | |
| if ( $this->use_mysqli ) { | |
| $this->rows_affected = mysqli_affected_rows( $this->dbh ); | |
| } else { | |
| $this->rows_affected = mysql_affected_rows( $this->dbh ); | |
| } | |
| // Take note of the insert_id | |
| if ( preg_match( '/^\s*(insert|replace)\s/i', $query ) ) { | |
| if ( $this->use_mysqli ) { | |
| $this->insert_id = mysqli_insert_id( $this->dbh ); | |
| } else { | |
| $this->insert_id = mysql_insert_id( $this->dbh ); | |
| } | |
| } | |
| // Return number of rows affected | |
| $return_val = $this->rows_affected; | |
| } else { | |
| $num_rows = 0; | |
| if ( $this->use_mysqli && $this->result instanceof mysqli_result ) { | |
| while ( $row = @mysqli_fetch_object( $this->result ) ) { | |
| $this->last_result[$num_rows] = $row; | |
| $num_rows++; | |
| } | |
| } elseif ( is_resource( $this->result ) ) { | |
| while ( $row = @mysql_fetch_object( $this->result ) ) { | |
| $this->last_result[$num_rows] = $row; | |
| $num_rows++; | |
| } | |
| } | |
| // Log number of rows the query returned | |
| // and return number of rows selected | |
| $this->num_rows = $num_rows; | |
| $return_val = $num_rows; | |
| } | |
| return $return_val; | |
| } | |
| /** | |
| * Internal function to perform the mysql_query() call. | |
| * | |
| * @since 3.9.0 | |
| * | |
| * @access private | |
| * @see wpdb::query() | |
| * | |
| * @param string $query The query to run. | |
| */ | |
| private function _do_query( $query ) { | |
| if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) { | |
| $this->timer_start(); | |
| } | |
| if ( $this->use_mysqli ) { | |
| $this->result = @mysqli_query( $this->dbh, $query ); | |
| } else { | |
| $this->result = @mysql_query( $query, $this->dbh ); | |
| } | |
| $this->num_queries++; | |
| if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) { | |
| $this->queries[] = array( $query, $this->timer_stop(), $this->get_caller() ); | |
| } | |
| } | |
| /** | |
| * Insert a row into a table. | |
| * | |
| * wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 'bar' ) ) | |
| * wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( '%s', '%d' ) ) | |
| * | |
| * @since 2.5.0 | |
| * @see wpdb::prepare() | |
| * @see wpdb::$field_types | |
| * @see wp_set_wpdb_vars() | |
| * | |
| * @param string $table Table name | |
| * @param array $data Data to insert (in column => value pairs). | |
| * Both $data columns and $data values should be "raw" (neither should be SQL escaped). | |
| * Sending a null value will cause the column to be set to NULL - the corresponding format is ignored in this case. | |
| * @param array|string $format Optional. An array of formats to be mapped to each of the value in $data. | |
| * If string, that format will be used for all of the values in $data. | |
| * A format is one of '%d', '%f', '%s' (integer, float, string). | |
| * If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types. | |
| * @return int|false The number of rows inserted, or false on error. | |
| */ | |
| public function insert( $table, $data, $format = null ) { | |
| return $this->_insert_replace_helper( $table, $data, $format, 'INSERT' ); | |
| } | |
| /** | |
| * Replace a row into a table. | |
| * | |
| * wpdb::replace( 'table', array( 'column' => 'foo', 'field' => 'bar' ) ) | |
| * wpdb::replace( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( '%s', '%d' ) ) | |
| * | |
| * @since 3.0.0 | |
| * @see wpdb::prepare() | |
| * @see wpdb::$field_types | |
| * @see wp_set_wpdb_vars() | |
| * | |
| * @param string $table Table name | |
| * @param array $data Data to insert (in column => value pairs). | |
| * Both $data columns and $data values should be "raw" (neither should be SQL escaped). | |
| * Sending a null value will cause the column to be set to NULL - the corresponding format is ignored in this case. | |
| * @param array|string $format Optional. An array of formats to be mapped to each of the value in $data. | |
| * If string, that format will be used for all of the values in $data. | |
| * A format is one of '%d', '%f', '%s' (integer, float, string). | |
| * If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types. | |
| * @return int|false The number of rows affected, or false on error. | |
| */ | |
| public function replace( $table, $data, $format = null ) { | |
| return $this->_insert_replace_helper( $table, $data, $format, 'REPLACE' ); | |
| } | |
| /** | |
| * Helper function for insert and replace. | |
| * | |
| * Runs an insert or replace query based on $type argument. | |
| * | |
| * @access private | |
| * @since 3.0.0 | |
| * @see wpdb::prepare() | |
| * @see wpdb::$field_types | |
| * @see wp_set_wpdb_vars() | |
| * | |
| * @param string $table Table name | |
| * @param array $data Data to insert (in column => value pairs). | |
| * Both $data columns and $data values should be "raw" (neither should be SQL escaped). | |
| * Sending a null value will cause the column to be set to NULL - the corresponding format is ignored in this case. | |
| * @param array|string $format Optional. An array of formats to be mapped to each of the value in $data. | |
| * If string, that format will be used for all of the values in $data. | |
| * A format is one of '%d', '%f', '%s' (integer, float, string). | |
| * If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types. | |
| * @param string $type Optional. What type of operation is this? INSERT or REPLACE. Defaults to INSERT. | |
| * @return int|false The number of rows affected, or false on error. | |
| */ | |
| function _insert_replace_helper( $table, $data, $format = null, $type = 'INSERT' ) { | |
| $this->insert_id = 0; | |
| if ( ! in_array( strtoupper( $type ), array( 'REPLACE', 'INSERT' ) ) ) { | |
| return false; | |
| } | |
| $data = $this->process_fields( $table, $data, $format ); | |
| if ( false === $data ) { | |
| return false; | |
| } | |
| $formats = $values = array(); | |
| foreach ( $data as $value ) { | |
| if ( is_null( $value['value'] ) ) { | |
| $formats[] = 'NULL'; | |
| continue; | |
| } | |
| $formats[] = $value['format']; | |
| $values[] = $value['value']; | |
| } | |
| $fields = '`' . implode( '`, `', array_keys( $data ) ) . '`'; | |
| $formats = implode( ', ', $formats ); | |
| $sql = "$type INTO `$table` ($fields) VALUES ($formats)"; | |
| $this->check_current_query = false; | |
| return $this->query( $this->prepare( $sql, $values ) ); | |
| } | |
| /** | |
| * Update a row in the table | |
| * | |
| * wpdb::update( 'table', array( 'column' => 'foo', 'field' => 'bar' ), array( 'ID' => 1 ) ) | |
| * wpdb::update( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( 'ID' => 1 ), array( '%s', '%d' ), array( '%d' ) ) | |
| * | |
| * @since 2.5.0 | |
| * @see wpdb::prepare() | |
| * @see wpdb::$field_types | |
| * @see wp_set_wpdb_vars() | |
| * | |
| * @param string $table Table name | |
| * @param array $data Data to update (in column => value pairs). | |
| * Both $data columns and $data values should be "raw" (neither should be SQL escaped). | |
| * Sending a null value will cause the column to be set to NULL - the corresponding | |
| * format is ignored in this case. | |
| * @param array $where A named array of WHERE clauses (in column => value pairs). | |
| * Multiple clauses will be joined with ANDs. | |
| * Both $where columns and $where values should be "raw". | |
| * Sending a null value will create an IS NULL comparison - the corresponding format will be ignored in this case. | |
| * @param array|string $format Optional. An array of formats to be mapped to each of the values in $data. | |
| * If string, that format will be used for all of the values in $data. | |
| * A format is one of '%d', '%f', '%s' (integer, float, string). | |
| * If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types. | |
| * @param array|string $where_format Optional. An array of formats to be mapped to each of the values in $where. | |
| * If string, that format will be used for all of the items in $where. | |
| * A format is one of '%d', '%f', '%s' (integer, float, string). | |
| * If omitted, all values in $where will be treated as strings. | |
| * @return int|false The number of rows updated, or false on error. | |
| */ | |
| public function update( $table, $data, $where, $format = null, $where_format = null ) { | |
| if ( ! is_array( $data ) || ! is_array( $where ) ) { | |
| return false; | |
| } | |
| $data = $this->process_fields( $table, $data, $format ); | |
| if ( false === $data ) { | |
| return false; | |
| } | |
| $where = $this->process_fields( $table, $where, $where_format ); | |
| if ( false === $where ) { | |
| return false; | |
| } | |
| $fields = $conditions = $values = array(); | |
| foreach ( $data as $field => $value ) { | |
| if ( is_null( $value['value'] ) ) { | |
| $fields[] = "`$field` = NULL"; | |
| continue; | |
| } | |
| $fields[] = "`$field` = " . $value['format']; | |
| $values[] = $value['value']; | |
| } | |
| foreach ( $where as $field => $value ) { | |
| if ( is_null( $value['value'] ) ) { | |
| $conditions[] = "`$field` IS NULL"; | |
| continue; | |
| } | |
| $conditions[] = "`$field` = " . $value['format']; | |
| $values[] = $value['value']; | |
| } | |
| $fields = implode( ', ', $fields ); | |
| $conditions = implode( ' AND ', $conditions ); | |
| $sql = "UPDATE `$table` SET $fields WHERE $conditions"; | |
| $this->check_current_query = false; | |
| return $this->query( $this->prepare( $sql, $values ) ); | |
| } | |
| /** | |
| * Delete a row in the table | |
| * | |
| * wpdb::delete( 'table', array( 'ID' => 1 ) ) | |
| * wpdb::delete( 'table', array( 'ID' => 1 ), array( '%d' ) ) | |
| * | |
| * @since 3.4.0 | |
| * @see wpdb::prepare() | |
| * @see wpdb::$field_types | |
| * @see wp_set_wpdb_vars() | |
| * | |
| * @param string $table Table name | |
| * @param array $where A named array of WHERE clauses (in column => value pairs). | |
| * Multiple clauses will be joined with ANDs. | |
| * Both $where columns and $where values should be "raw". | |
| * Sending a null value will create an IS NULL comparison - the corresponding format will be ignored in this case. | |
| * @param array|string $where_format Optional. An array of formats to be mapped to each of the values in $where. | |
| * If string, that format will be used for all of the items in $where. | |
| * A format is one of '%d', '%f', '%s' (integer, float, string). | |
| * If omitted, all values in $where will be treated as strings unless otherwise specified in wpdb::$field_types. | |
| * @return int|false The number of rows updated, or false on error. | |
| */ | |
| public function delete( $table, $where, $where_format = null ) { | |
| if ( ! is_array( $where ) ) { | |
| return false; | |
| } | |
| $where = $this->process_fields( $table, $where, $where_format ); | |
| if ( false === $where ) { | |
| return false; | |
| } | |
| $conditions = $values = array(); | |
| foreach ( $where as $field => $value ) { | |
| if ( is_null( $value['value'] ) ) { | |
| $conditions[] = "`$field` IS NULL"; | |
| continue; | |
| } | |
| $conditions[] = "`$field` = " . $value['format']; | |
| $values[] = $value['value']; | |
| } | |
| $conditions = implode( ' AND ', $conditions ); | |
| $sql = "DELETE FROM `$table` WHERE $conditions"; | |
| $this->check_current_query = false; | |
| return $this->query( $this->prepare( $sql, $values ) ); | |
| } | |
| /** | |
| * Processes arrays of field/value pairs and field formats. | |
| * | |
| * This is a helper method for wpdb's CRUD methods, which take field/value | |
| * pairs for inserts, updates, and where clauses. This method first pairs | |
| * each value with a format. Then it determines the charset of that field, | |
| * using that to determine if any invalid text would be stripped. If text is | |
| * stripped, then field processing is rejected and the query fails. | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * | |
| * @param string $table Table name. | |
| * @param array $data Field/value pair. | |
| * @param mixed $format Format for each field. | |
| * @return array|false Returns an array of fields that contain paired values | |
| * and formats. Returns false for invalid values. | |
| */ | |
| protected function process_fields( $table, $data, $format ) { | |
| $data = $this->process_field_formats( $data, $format ); | |
| if ( false === $data ) { | |
| return false; | |
| } | |
| $data = $this->process_field_charsets( $data, $table ); | |
| if ( false === $data ) { | |
| return false; | |
| } | |
| $data = $this->process_field_lengths( $data, $table ); | |
| if ( false === $data ) { | |
| return false; | |
| } | |
| $converted_data = $this->strip_invalid_text( $data ); | |
| if ( $data !== $converted_data ) { | |
| return false; | |
| } | |
| return $data; | |
| } | |
| /** | |
| * Prepares arrays of value/format pairs as passed to wpdb CRUD methods. | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * | |
| * @param array $data Array of fields to values. | |
| * @param mixed $format Formats to be mapped to the values in $data. | |
| * @return array Array, keyed by field names with values being an array | |
| * of 'value' and 'format' keys. | |
| */ | |
| protected function process_field_formats( $data, $format ) { | |
| $formats = $original_formats = (array) $format; | |
| foreach ( $data as $field => $value ) { | |
| $value = array( | |
| 'value' => $value, | |
| 'format' => '%s', | |
| ); | |
| if ( ! empty( $format ) ) { | |
| $value['format'] = array_shift( $formats ); | |
| if ( ! $value['format'] ) { | |
| $value['format'] = reset( $original_formats ); | |
| } | |
| } elseif ( isset( $this->field_types[ $field ] ) ) { | |
| $value['format'] = $this->field_types[ $field ]; | |
| } | |
| $data[ $field ] = $value; | |
| } | |
| return $data; | |
| } | |
| /** | |
| * Adds field charsets to field/value/format arrays generated by | |
| * the wpdb::process_field_formats() method. | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * | |
| * @param array $data As it comes from the wpdb::process_field_formats() method. | |
| * @param string $table Table name. | |
| * @return array|false The same array as $data with additional 'charset' keys. | |
| */ | |
| protected function process_field_charsets( $data, $table ) { | |
| foreach ( $data as $field => $value ) { | |
| if ( '%d' === $value['format'] || '%f' === $value['format'] ) { | |
| /* | |
| * We can skip this field if we know it isn't a string. | |
| * This checks %d/%f versus ! %s because its sprintf() could take more. | |
| */ | |
| $value['charset'] = false; | |
| } else { | |
| $value['charset'] = $this->get_col_charset( $table, $field ); | |
| if ( is_wp_error( $value['charset'] ) ) { | |
| return false; | |
| } | |
| } | |
| $data[ $field ] = $value; | |
| } | |
| return $data; | |
| } | |
| /** | |
| * For string fields, record the maximum string length that field can safely save. | |
| * | |
| * @since 4.2.1 | |
| * @access protected | |
| * | |
| * @param array $data As it comes from the wpdb::process_field_charsets() method. | |
| * @param string $table Table name. | |
| * @return array|false The same array as $data with additional 'length' keys, or false if | |
| * any of the values were too long for their corresponding field. | |
| */ | |
| protected function process_field_lengths( $data, $table ) { | |
| foreach ( $data as $field => $value ) { | |
| if ( '%d' === $value['format'] || '%f' === $value['format'] ) { | |
| /* | |
| * We can skip this field if we know it isn't a string. | |
| * This checks %d/%f versus ! %s because its sprintf() could take more. | |
| */ | |
| $value['length'] = false; | |
| } else { | |
| $value['length'] = $this->get_col_length( $table, $field ); | |
| if ( is_wp_error( $value['length'] ) ) { | |
| return false; | |
| } | |
| } | |
| $data[ $field ] = $value; | |
| } | |
| return $data; | |
| } | |
| /** | |
| * Retrieve one variable from the database. | |
| * | |
| * Executes a SQL query and returns the value from the SQL result. | |
| * If the SQL result contains more than one column and/or more than one row, this function returns the value in the column and row specified. | |
| * If $query is null, this function returns the value in the specified column and row from the previous SQL result. | |
| * | |
| * @since 0.71 | |
| * | |
| * @param string|null $query Optional. SQL query. Defaults to null, use the result from the previous query. | |
| * @param int $x Optional. Column of value to return. Indexed from 0. | |
| * @param int $y Optional. Row of value to return. Indexed from 0. | |
| * @return string|null Database query result (as string), or null on failure | |
| */ | |
| public function get_var( $query = null, $x = 0, $y = 0 ) { | |
| $this->func_call = "\$db->get_var(\"$query\", $x, $y)"; | |
| if ( $this->check_current_query && $this->check_safe_collation( $query ) ) { | |
| $this->check_current_query = false; | |
| } | |
| if ( $query ) { | |
| $this->query( $query ); | |
| } | |
| // Extract var out of cached results based x,y vals | |
| if ( !empty( $this->last_result[$y] ) ) { | |
| $values = array_values( get_object_vars( $this->last_result[$y] ) ); | |
| } | |
| // If there is a value return it else return null | |
| return ( isset( $values[$x] ) && $values[$x] !== '' ) ? $values[$x] : null; | |
| } | |
| /** | |
| * Retrieve one row from the database. | |
| * | |
| * Executes a SQL query and returns the row from the SQL result. | |
| * | |
| * @since 0.71 | |
| * | |
| * @param string|null $query SQL query. | |
| * @param string $output Optional. one of ARRAY_A | ARRAY_N | OBJECT constants. | |
| * Return an associative array (column => value, ...), | |
| * a numerically indexed array (0 => value, ...) or | |
| * an object ( ->column = value ), respectively. | |
| * @param int $y Optional. Row to return. Indexed from 0. | |
| * @return array|object|null|void Database query result in format specified by $output or null on failure | |
| */ | |
| public function get_row( $query = null, $output = OBJECT, $y = 0 ) { | |
| $this->func_call = "\$db->get_row(\"$query\",$output,$y)"; | |
| if ( $this->check_current_query && $this->check_safe_collation( $query ) ) { | |
| $this->check_current_query = false; | |
| } | |
| if ( $query ) { | |
| $this->query( $query ); | |
| } else { | |
| return null; | |
| } | |
| if ( !isset( $this->last_result[$y] ) ) | |
| return null; | |
| if ( $output == OBJECT ) { | |
| return $this->last_result[$y] ? $this->last_result[$y] : null; | |
| } elseif ( $output == ARRAY_A ) { | |
| return $this->last_result[$y] ? get_object_vars( $this->last_result[$y] ) : null; | |
| } elseif ( $output == ARRAY_N ) { | |
| return $this->last_result[$y] ? array_values( get_object_vars( $this->last_result[$y] ) ) : null; | |
| } elseif ( strtoupper( $output ) === OBJECT ) { | |
| // Back compat for OBJECT being previously case insensitive. | |
| return $this->last_result[$y] ? $this->last_result[$y] : null; | |
| } else { | |
| $this->print_error( " \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N" ); | |
| } | |
| } | |
| /** | |
| * Retrieve one column from the database. | |
| * | |
| * Executes a SQL query and returns the column from the SQL result. | |
| * If the SQL result contains more than one column, this function returns the column specified. | |
| * If $query is null, this function returns the specified column from the previous SQL result. | |
| * | |
| * @since 0.71 | |
| * | |
| * @param string|null $query Optional. SQL query. Defaults to previous query. | |
| * @param int $x Optional. Column to return. Indexed from 0. | |
| * @return array Database query result. Array indexed from 0 by SQL result row number. | |
| */ | |
| public function get_col( $query = null , $x = 0 ) { | |
| if ( $this->check_current_query && $this->check_safe_collation( $query ) ) { | |
| $this->check_current_query = false; | |
| } | |
| if ( $query ) { | |
| $this->query( $query ); | |
| } | |
| $new_array = array(); | |
| // Extract the column values | |
| for ( $i = 0, $j = count( $this->last_result ); $i < $j; $i++ ) { | |
| $new_array[$i] = $this->get_var( null, $x, $i ); | |
| } | |
| return $new_array; | |
| } | |
| /** | |
| * Retrieve an entire SQL result set from the database (i.e., many rows) | |
| * | |
| * Executes a SQL query and returns the entire SQL result. | |
| * | |
| * @since 0.71 | |
| * | |
| * @param string $query SQL query. | |
| * @param string $output Optional. Any of ARRAY_A | ARRAY_N | OBJECT | OBJECT_K constants. | |
| * With one of the first three, return an array of rows indexed from 0 by SQL result row number. | |
| * Each row is an associative array (column => value, ...), a numerically indexed array (0 => value, ...), or an object. ( ->column = value ), respectively. | |
| * With OBJECT_K, return an associative array of row objects keyed by the value of each row's first column's value. | |
| * Duplicate keys are discarded. | |
| * @return array|object|null Database query results | |
| */ | |
| public function get_results( $query = null, $output = OBJECT ) { | |
| $this->func_call = "\$db->get_results(\"$query\", $output)"; | |
| if ( $this->check_current_query && $this->check_safe_collation( $query ) ) { | |
| $this->check_current_query = false; | |
| } | |
| if ( $query ) { | |
| $this->query( $query ); | |
| } else { | |
| return null; | |
| } | |
| $new_array = array(); | |
| if ( $output == OBJECT ) { | |
| // Return an integer-keyed array of row objects | |
| return $this->last_result; | |
| } elseif ( $output == OBJECT_K ) { | |
| // Return an array of row objects with keys from column 1 | |
| // (Duplicates are discarded) | |
| foreach ( $this->last_result as $row ) { | |
| $var_by_ref = get_object_vars( $row ); | |
| $key = array_shift( $var_by_ref ); | |
| if ( ! isset( $new_array[ $key ] ) ) | |
| $new_array[ $key ] = $row; | |
| } | |
| return $new_array; | |
| } elseif ( $output == ARRAY_A || $output == ARRAY_N ) { | |
| // Return an integer-keyed array of... | |
| if ( $this->last_result ) { | |
| foreach ( (array) $this->last_result as $row ) { | |
| if ( $output == ARRAY_N ) { | |
| // ...integer-keyed row arrays | |
| $new_array[] = array_values( get_object_vars( $row ) ); | |
| } else { | |
| // ...column name-keyed row arrays | |
| $new_array[] = get_object_vars( $row ); | |
| } | |
| } | |
| } | |
| return $new_array; | |
| } elseif ( strtoupper( $output ) === OBJECT ) { | |
| // Back compat for OBJECT being previously case insensitive. | |
| return $this->last_result; | |
| } | |
| return null; | |
| } | |
| /** | |
| * Retrieves the character set for the given table. | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * | |
| * @param string $table Table name. | |
| * @return string|WP_Error Table character set, WP_Error object if it couldn't be found. | |
| */ | |
| protected function get_table_charset( $table ) { | |
| $tablekey = strtolower( $table ); | |
| /** | |
| * Filter the table charset value before the DB is checked. | |
| * | |
| * Passing a non-null value to the filter will effectively short-circuit | |
| * checking the DB for the charset, returning that value instead. | |
| * | |
| * @since 4.2.0 | |
| * | |
| * @param string $charset The character set to use. Default null. | |
| * @param string $table The name of the table being checked. | |
| */ | |
| $charset = apply_filters( 'pre_get_table_charset', null, $table ); | |
| if ( null !== $charset ) { | |
| return $charset; | |
| } | |
| if ( isset( $this->table_charset[ $tablekey ] ) ) { | |
| return $this->table_charset[ $tablekey ]; | |
| } | |
| $charsets = $columns = array(); | |
| $table_parts = explode( '.', $table ); | |
| $table = '`' . implode( '`.`', $table_parts ) . '`'; | |
| $results = $this->get_results( "SHOW FULL COLUMNS FROM $table" ); | |
| if ( ! $results ) { | |
| return new WP_Error( 'wpdb_get_table_charset_failure' ); | |
| } | |
| foreach ( $results as $column ) { | |
| $columns[ strtolower( $column->Field ) ] = $column; | |
| } | |
| $this->col_meta[ $tablekey ] = $columns; | |
| foreach ( $columns as $column ) { | |
| if ( ! empty( $column->Collation ) ) { | |
| list( $charset ) = explode( '_', $column->Collation ); | |
| // If the current connection can't support utf8mb4 characters, let's only send 3-byte utf8 characters. | |
| if ( 'utf8mb4' === $charset && ! $this->has_cap( 'utf8mb4' ) ) { | |
| $charset = 'utf8'; | |
| } | |
| $charsets[ strtolower( $charset ) ] = true; | |
| } | |
| list( $type ) = explode( '(', $column->Type ); | |
| // A binary/blob means the whole query gets treated like this. | |
| if ( in_array( strtoupper( $type ), array( 'BINARY', 'VARBINARY', 'TINYBLOB', 'MEDIUMBLOB', 'BLOB', 'LONGBLOB' ) ) ) { | |
| $this->table_charset[ $tablekey ] = 'binary'; | |
| return 'binary'; | |
| } | |
| } | |
| // utf8mb3 is an alias for utf8. | |
| if ( isset( $charsets['utf8mb3'] ) ) { | |
| $charsets['utf8'] = true; | |
| unset( $charsets['utf8mb3'] ); | |
| } | |
| // Check if we have more than one charset in play. | |
| $count = count( $charsets ); | |
| if ( 1 === $count ) { | |
| $charset = key( $charsets ); | |
| } elseif ( 0 === $count ) { | |
| // No charsets, assume this table can store whatever. | |
| $charset = false; | |
| } else { | |
| // More than one charset. Remove latin1 if present and recalculate. | |
| unset( $charsets['latin1'] ); | |
| $count = count( $charsets ); | |
| if ( 1 === $count ) { | |
| // Only one charset (besides latin1). | |
| $charset = key( $charsets ); | |
| } elseif ( 2 === $count && isset( $charsets['utf8'], $charsets['utf8mb4'] ) ) { | |
| // Two charsets, but they're utf8 and utf8mb4, use utf8. | |
| $charset = 'utf8'; | |
| } else { | |
| // Two mixed character sets. ascii. | |
| $charset = 'ascii'; | |
| } | |
| } | |
| $this->table_charset[ $tablekey ] = $charset; | |
| return $charset; | |
| } | |
| /** | |
| * Retrieves the character set for the given column. | |
| * | |
| * @since 4.2.0 | |
| * @access public | |
| * | |
| * @param string $table Table name. | |
| * @param string $column Column name. | |
| * @return string|false|WP_Error Column character set as a string. False if the column has no | |
| * character set. WP_Error object if there was an error. | |
| */ | |
| public function get_col_charset( $table, $column ) { | |
| $tablekey = strtolower( $table ); | |
| $columnkey = strtolower( $column ); | |
| /** | |
| * Filter the column charset value before the DB is checked. | |
| * | |
| * Passing a non-null value to the filter will short-circuit | |
| * checking the DB for the charset, returning that value instead. | |
| * | |
| * @since 4.2.0 | |
| * | |
| * @param string $charset The character set to use. Default null. | |
| * @param string $table The name of the table being checked. | |
| * @param string $column The name of the column being checked. | |
| */ | |
| $charset = apply_filters( 'pre_get_col_charset', null, $table, $column ); | |
| if ( null !== $charset ) { | |
| return $charset; | |
| } | |
| // Skip this entirely if this isn't a MySQL database. | |
| if ( empty( $this->is_mysql ) ) { | |
| return false; | |
| } | |
| if ( empty( $this->table_charset[ $tablekey ] ) ) { | |
| // This primes column information for us. | |
| $table_charset = $this->get_table_charset( $table ); | |
| if ( is_wp_error( $table_charset ) ) { | |
| return $table_charset; | |
| } | |
| } | |
| // If still no column information, return the table charset. | |
| if ( empty( $this->col_meta[ $tablekey ] ) ) { | |
| return $this->table_charset[ $tablekey ]; | |
| } | |
| // If this column doesn't exist, return the table charset. | |
| if ( empty( $this->col_meta[ $tablekey ][ $columnkey ] ) ) { | |
| return $this->table_charset[ $tablekey ]; | |
| } | |
| // Return false when it's not a string column. | |
| if ( empty( $this->col_meta[ $tablekey ][ $columnkey ]->Collation ) ) { | |
| return false; | |
| } | |
| list( $charset ) = explode( '_', $this->col_meta[ $tablekey ][ $columnkey ]->Collation ); | |
| return $charset; | |
| } | |
| /** | |
| * Retrieve the maximum string length allowed in a given column. | |
| * The length may either be specified as a byte length or a character length. | |
| * | |
| * @since 4.2.1 | |
| * @access public | |
| * | |
| * @param string $table Table name. | |
| * @param string $column Column name. | |
| * @return array|false|WP_Error array( 'length' => (int), 'type' => 'byte' | 'char' ) | |
| * false if the column has no length (for example, numeric column) | |
| * WP_Error object if there was an error. | |
| */ | |
| public function get_col_length( $table, $column ) { | |
| $tablekey = strtolower( $table ); | |
| $columnkey = strtolower( $column ); | |
| // Skip this entirely if this isn't a MySQL database. | |
| if ( empty( $this->is_mysql ) ) { | |
| return false; | |
| } | |
| if ( empty( $this->col_meta[ $tablekey ] ) ) { | |
| // This primes column information for us. | |
| $table_charset = $this->get_table_charset( $table ); | |
| if ( is_wp_error( $table_charset ) ) { | |
| return $table_charset; | |
| } | |
| } | |
| if ( empty( $this->col_meta[ $tablekey ][ $columnkey ] ) ) { | |
| return false; | |
| } | |
| $typeinfo = explode( '(', $this->col_meta[ $tablekey ][ $columnkey ]->Type ); | |
| $type = strtolower( $typeinfo[0] ); | |
| if ( ! empty( $typeinfo[1] ) ) { | |
| $length = trim( $typeinfo[1], ')' ); | |
| } else { | |
| $length = false; | |
| } | |
| switch( $type ) { | |
| case 'char': | |
| case 'varchar': | |
| return array( | |
| 'type' => 'char', | |
| 'length' => (int) $length, | |
| ); | |
| case 'binary': | |
| case 'varbinary': | |
| return array( | |
| 'type' => 'byte', | |
| 'length' => (int) $length, | |
| ); | |
| case 'tinyblob': | |
| case 'tinytext': | |
| return array( | |
| 'type' => 'byte', | |
| 'length' => 255, // 2^8 - 1 | |
| ); | |
| case 'blob': | |
| case 'text': | |
| return array( | |
| 'type' => 'byte', | |
| 'length' => 65535, // 2^16 - 1 | |
| ); | |
| case 'mediumblob': | |
| case 'mediumtext': | |
| return array( | |
| 'type' => 'byte', | |
| 'length' => 16777215, // 2^24 - 1 | |
| ); | |
| case 'longblob': | |
| case 'longtext': | |
| return array( | |
| 'type' => 'byte', | |
| 'length' => 4294967295, // 2^32 - 1 | |
| ); | |
| default: | |
| return false; | |
| } | |
| } | |
| /** | |
| * Check if a string is ASCII. | |
| * | |
| * The negative regex is faster for non-ASCII strings, as it allows | |
| * the search to finish as soon as it encounters a non-ASCII character. | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * | |
| * @param string $string String to check. | |
| * @return bool True if ASCII, false if not. | |
| */ | |
| protected function check_ascii( $string ) { | |
| if ( function_exists( 'mb_check_encoding' ) ) { | |
| if ( mb_check_encoding( $string, 'ASCII' ) ) { | |
| return true; | |
| } | |
| } elseif ( ! preg_match( '/[^\x00-\x7F]/', $string ) ) { | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Check if the query is accessing a collation considered safe on the current version of MySQL. | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * | |
| * @param string $query The query to check. | |
| * @return bool True if the collation is safe, false if it isn't. | |
| */ | |
| protected function check_safe_collation( $query ) { | |
| if ( $this->checking_collation ) { | |
| return true; | |
| } | |
| // We don't need to check the collation for queries that don't read data. | |
| $query = ltrim( $query, "\r\n\t (" ); | |
| if ( preg_match( '/^(?:SHOW|DESCRIBE|DESC|EXPLAIN|CREATE)\s/i', $query ) ) { | |
| return true; | |
| } | |
| // All-ASCII queries don't need extra checking. | |
| if ( $this->check_ascii( $query ) ) { | |
| return true; | |
| } | |
| $table = $this->get_table_from_query( $query ); | |
| if ( ! $table ) { | |
| return false; | |
| } | |
| $this->checking_collation = true; | |
| $collation = $this->get_table_charset( $table ); | |
| $this->checking_collation = false; | |
| // Tables with no collation, or latin1 only, don't need extra checking. | |
| if ( false === $collation || 'latin1' === $collation ) { | |
| return true; | |
| } | |
| $table = strtolower( $table ); | |
| if ( empty( $this->col_meta[ $table ] ) ) { | |
| return false; | |
| } | |
| // If any of the columns don't have one of these collations, it needs more sanity checking. | |
| foreach ( $this->col_meta[ $table ] as $col ) { | |
| if ( empty( $col->Collation ) ) { | |
| continue; | |
| } | |
| if ( ! in_array( $col->Collation, array( 'utf8_general_ci', 'utf8_bin', 'utf8mb4_general_ci', 'utf8mb4_bin' ), true ) ) { | |
| return false; | |
| } | |
| } | |
| return true; | |
| } | |
| /** | |
| * Strips any invalid characters based on value/charset pairs. | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * | |
| * @param array $data Array of value arrays. Each value array has the keys | |
| * 'value' and 'charset'. An optional 'ascii' key can be | |
| * set to false to avoid redundant ASCII checks. | |
| * @return array|WP_Error The $data parameter, with invalid characters removed from | |
| * each value. This works as a passthrough: any additional keys | |
| * such as 'field' are retained in each value array. If we cannot | |
| * remove invalid characters, a WP_Error object is returned. | |
| */ | |
| protected function strip_invalid_text( $data ) { | |
| $db_check_string = false; | |
| foreach ( $data as &$value ) { | |
| $charset = $value['charset']; | |
| if ( is_array( $value['length'] ) ) { | |
| $length = $value['length']['length']; | |
| $truncate_by_byte_length = 'byte' === $value['length']['type']; | |
| } else { | |
| $length = false; | |
| // Since we have no length, we'll never truncate. | |
| // Initialize the variable to false. true would take us | |
| // through an unnecessary (for this case) codepath below. | |
| $truncate_by_byte_length = false; | |
| } | |
| // There's no charset to work with. | |
| if ( false === $charset ) { | |
| continue; | |
| } | |
| // Column isn't a string. | |
| if ( ! is_string( $value['value'] ) ) { | |
| continue; | |
| } | |
| $needs_validation = true; | |
| if ( | |
| // latin1 can store any byte sequence | |
| 'latin1' === $charset | |
| || | |
| // ASCII is always OK. | |
| ( ! isset( $value['ascii'] ) && $this->check_ascii( $value['value'] ) ) | |
| ) { | |
| $truncate_by_byte_length = true; | |
| $needs_validation = false; | |
| } | |
| if ( $truncate_by_byte_length ) { | |
| mbstring_binary_safe_encoding(); | |
| if ( false !== $length && strlen( $value['value'] ) > $length ) { | |
| $value['value'] = substr( $value['value'], 0, $length ); | |
| } | |
| reset_mbstring_encoding(); | |
| if ( ! $needs_validation ) { | |
| continue; | |
| } | |
| } | |
| // utf8 can be handled by regex, which is a bunch faster than a DB lookup. | |
| if ( ( 'utf8' === $charset || 'utf8mb3' === $charset || 'utf8mb4' === $charset ) && function_exists( 'mb_strlen' ) ) { | |
| $regex = '/ | |
| ( | |
| (?: [\x00-\x7F] # single-byte sequences 0xxxxxxx | |
| | [\xC2-\xDF][\x80-\xBF] # double-byte sequences 110xxxxx 10xxxxxx | |
| | \xE0[\xA0-\xBF][\x80-\xBF] # triple-byte sequences 1110xxxx 10xxxxxx * 2 | |
| | [\xE1-\xEC][\x80-\xBF]{2} | |
| | \xED[\x80-\x9F][\x80-\xBF] | |
| | [\xEE-\xEF][\x80-\xBF]{2}'; | |
| if ( 'utf8mb4' === $charset ) { | |
| $regex .= ' | |
| | \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences 11110xxx 10xxxxxx * 3 | |
| | [\xF1-\xF3][\x80-\xBF]{3} | |
| | \xF4[\x80-\x8F][\x80-\xBF]{2} | |
| '; | |
| } | |
| $regex .= '){1,40} # ...one or more times | |
| ) | |
| | . # anything else | |
| /x'; | |
| $value['value'] = preg_replace( $regex, '$1', $value['value'] ); | |
| if ( false !== $length && mb_strlen( $value['value'], 'UTF-8' ) > $length ) { | |
| $value['value'] = mb_substr( $value['value'], 0, $length, 'UTF-8' ); | |
| } | |
| continue; | |
| } | |
| // We couldn't use any local conversions, send it to the DB. | |
| $value['db'] = $db_check_string = true; | |
| } | |
| unset( $value ); // Remove by reference. | |
| if ( $db_check_string ) { | |
| $queries = array(); | |
| foreach ( $data as $col => $value ) { | |
| if ( ! empty( $value['db'] ) ) { | |
| // We're going to need to truncate by characters or bytes, depending on the length value we have. | |
| if ( 'byte' === $value['length']['type'] ) { | |
| // Using binary causes LEFT() to truncate by bytes. | |
| $charset = 'binary'; | |
| } else { | |
| $charset = $value['charset']; | |
| } | |
| if ( $this->charset ) { | |
| $connection_charset = $this->charset; | |
| } else { | |
| if ( $this->use_mysqli ) { | |
| $connection_charset = mysqli_character_set_name( $this->dbh ); | |
| } else { | |
| $connection_charset = mysql_client_encoding(); | |
| } | |
| } | |
| if ( is_array( $value['length'] ) ) { | |
| $queries[ $col ] = $this->prepare( "CONVERT( LEFT( CONVERT( %s USING $charset ), %.0f ) USING $connection_charset )", $value['value'], $value['length']['length'] ); | |
| } else if ( 'binary' !== $charset ) { | |
| // If we don't have a length, there's no need to convert binary - it will always return the same result. | |
| $queries[ $col ] = $this->prepare( "CONVERT( CONVERT( %s USING $charset ) USING $connection_charset )", $value['value'] ); | |
| } | |
| unset( $data[ $col ]['db'] ); | |
| } | |
| } | |
| $sql = array(); | |
| foreach ( $queries as $column => $query ) { | |
| if ( ! $query ) { | |
| continue; | |
| } | |
| $sql[] = $query . " AS x_$column"; | |
| } | |
| $this->check_current_query = false; | |
| $row = $this->get_row( "SELECT " . implode( ', ', $sql ), ARRAY_A ); | |
| if ( ! $row ) { | |
| return new WP_Error( 'wpdb_strip_invalid_text_failure' ); | |
| } | |
| foreach ( array_keys( $data ) as $column ) { | |
| if ( isset( $row["x_$column"] ) ) { | |
| $data[ $column ]['value'] = $row["x_$column"]; | |
| } | |
| } | |
| } | |
| return $data; | |
| } | |
| /** | |
| * Strips any invalid characters from the query. | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * | |
| * @param string $query Query to convert. | |
| * @return string|WP_Error The converted query, or a WP_Error object if the conversion fails. | |
| */ | |
| protected function strip_invalid_text_from_query( $query ) { | |
| // We don't need to check the collation for queries that don't read data. | |
| $trimmed_query = ltrim( $query, "\r\n\t (" ); | |
| if ( preg_match( '/^(?:SHOW|DESCRIBE|DESC|EXPLAIN|CREATE)\s/i', $trimmed_query ) ) { | |
| return $query; | |
| } | |
| $table = $this->get_table_from_query( $query ); | |
| if ( $table ) { | |
| $charset = $this->get_table_charset( $table ); | |
| if ( is_wp_error( $charset ) ) { | |
| return $charset; | |
| } | |
| // We can't reliably strip text from tables containing binary/blob columns | |
| if ( 'binary' === $charset ) { | |
| return $query; | |
| } | |
| } else { | |
| $charset = $this->charset; | |
| } | |
| $data = array( | |
| 'value' => $query, | |
| 'charset' => $charset, | |
| 'ascii' => false, | |
| 'length' => false, | |
| ); | |
| $data = $this->strip_invalid_text( array( $data ) ); | |
| if ( is_wp_error( $data ) ) { | |
| return $data; | |
| } | |
| return $data[0]['value']; | |
| } | |
| /** | |
| * Strips any invalid characters from the string for a given table and column. | |
| * | |
| * @since 4.2.0 | |
| * @access public | |
| * | |
| * @param string $table Table name. | |
| * @param string $column Column name. | |
| * @param string $value The text to check. | |
| * @return string|WP_Error The converted string, or a WP_Error object if the conversion fails. | |
| */ | |
| public function strip_invalid_text_for_column( $table, $column, $value ) { | |
| if ( ! is_string( $value ) ) { | |
| return $value; | |
| } | |
| $charset = $this->get_col_charset( $table, $column ); | |
| if ( ! $charset ) { | |
| // Not a string column. | |
| return $value; | |
| } elseif ( is_wp_error( $charset ) ) { | |
| // Bail on real errors. | |
| return $charset; | |
| } | |
| $data = array( | |
| $column => array( | |
| 'value' => $value, | |
| 'charset' => $charset, | |
| 'length' => $this->get_col_length( $table, $column ), | |
| ) | |
| ); | |
| $data = $this->strip_invalid_text( $data ); | |
| if ( is_wp_error( $data ) ) { | |
| return $data; | |
| } | |
| return $data[ $column ]['value']; | |
| } | |
| /** | |
| * Find the first table name referenced in a query. | |
| * | |
| * @since 4.2.0 | |
| * @access protected | |
| * | |
| * @param string $query The query to search. | |
| * @return string|false $table The table name found, or false if a table couldn't be found. | |
| */ | |
| protected function get_table_from_query( $query ) { | |
| // Remove characters that can legally trail the table name. | |
| $query = rtrim( $query, ';/-#' ); | |
| // Allow (select...) union [...] style queries. Use the first query's table name. | |
| $query = ltrim( $query, "\r\n\t (" ); | |
| // Strip everything between parentheses except nested selects. | |
| $query = preg_replace( '/\((?!\s*select)[^(]*?\)/is', '()', $query ); | |
| // Quickly match most common queries. | |
| if ( preg_match( '/^\s*(?:' | |
| . 'SELECT.*?\s+FROM' | |
| . '|INSERT(?:\s+LOW_PRIORITY|\s+DELAYED|\s+HIGH_PRIORITY)?(?:\s+IGNORE)?(?:\s+INTO)?' | |
| . '|REPLACE(?:\s+LOW_PRIORITY|\s+DELAYED)?(?:\s+INTO)?' | |
| . '|UPDATE(?:\s+LOW_PRIORITY)?(?:\s+IGNORE)?' | |
| . '|DELETE(?:\s+LOW_PRIORITY|\s+QUICK|\s+IGNORE)*(?:\s+FROM)?' | |
| . ')\s+((?:[0-9a-zA-Z$_.`-]|[\xC2-\xDF][\x80-\xBF])+)/is', $query, $maybe ) ) { | |
| return str_replace( '`', '', $maybe[1] ); | |
| } | |
| // SHOW TABLE STATUS and SHOW TABLES | |
| if ( preg_match( '/^\s*(?:' | |
| . 'SHOW\s+TABLE\s+STATUS.+(?:LIKE\s+|WHERE\s+Name\s*=\s*)' | |
| . '|SHOW\s+(?:FULL\s+)?TABLES.+(?:LIKE\s+|WHERE\s+Name\s*=\s*)' | |
| . ')\W((?:[0-9a-zA-Z$_.`-]|[\xC2-\xDF][\x80-\xBF])+)\W/is', $query, $maybe ) ) { | |
| return str_replace( '`', '', $maybe[1] ); | |
| } | |
| // Big pattern for the rest of the table-related queries. | |
| if ( preg_match( '/^\s*(?:' | |
| . '(?:EXPLAIN\s+(?:EXTENDED\s+)?)?SELECT.*?\s+FROM' | |
| . '|DESCRIBE|DESC|EXPLAIN|HANDLER' | |
| . '|(?:LOCK|UNLOCK)\s+TABLE(?:S)?' | |
| . '|(?:RENAME|OPTIMIZE|BACKUP|RESTORE|CHECK|CHECKSUM|ANALYZE|REPAIR).*\s+TABLE' | |
| . '|TRUNCATE(?:\s+TABLE)?' | |
| . '|CREATE(?:\s+TEMPORARY)?\s+TABLE(?:\s+IF\s+NOT\s+EXISTS)?' | |
| . '|ALTER(?:\s+IGNORE)?\s+TABLE' | |
| . '|DROP\s+TABLE(?:\s+IF\s+EXISTS)?' | |
| . '|CREATE(?:\s+\w+)?\s+INDEX.*\s+ON' | |
| . '|DROP\s+INDEX.*\s+ON' | |
| . '|LOAD\s+DATA.*INFILE.*INTO\s+TABLE' | |
| . '|(?:GRANT|REVOKE).*ON\s+TABLE' | |
| . '|SHOW\s+(?:.*FROM|.*TABLE)' | |
| . ')\s+\(*\s*((?:[0-9a-zA-Z$_.`-]|[\xC2-\xDF][\x80-\xBF])+)\s*\)*/is', $query, $maybe ) ) { | |
| return str_replace( '`', '', $maybe[1] ); | |
| } | |
| return false; | |
| } | |
| /** | |
| * Load the column metadata from the last query. | |
| * | |
| * @since 3.5.0 | |
| * | |
| * @access protected | |
| */ | |
| protected function load_col_info() { | |
| if ( $this->col_info ) | |
| return; | |
| if ( $this->use_mysqli ) { | |
| $num_fields = @mysqli_num_fields( $this->result ); | |
| for ( $i = 0; $i < $num_fields; $i++ ) { | |
| $this->col_info[ $i ] = @mysqli_fetch_field( $this->result ); | |
| } | |
| } else { | |
| $num_fields = @mysql_num_fields( $this->result ); | |
| for ( $i = 0; $i < $num_fields; $i++ ) { | |
| $this->col_info[ $i ] = @mysql_fetch_field( $this->result, $i ); | |
| } | |
| } | |
| } | |
| /** | |
| * Retrieve column metadata from the last query. | |
| * | |
| * @since 0.71 | |
| * | |
| * @param string $info_type Optional. Type one of name, table, def, max_length, not_null, primary_key, multiple_key, unique_key, numeric, blob, type, unsigned, zerofill | |
| * @param int $col_offset Optional. 0: col name. 1: which table the col's in. 2: col's max length. 3: if the col is numeric. 4: col's type | |
| * @return mixed Column Results | |
| */ | |
| public function get_col_info( $info_type = 'name', $col_offset = -1 ) { | |
| $this->load_col_info(); | |
| if ( $this->col_info ) { | |
| if ( $col_offset == -1 ) { | |
| $i = 0; | |
| $new_array = array(); | |
| foreach ( (array) $this->col_info as $col ) { | |
| $new_array[$i] = $col->{$info_type}; | |
| $i++; | |
| } | |
| return $new_array; | |
| } else { | |
| return $this->col_info[$col_offset]->{$info_type}; | |
| } | |
| } | |
| } | |
| /** | |
| * Starts the timer, for debugging purposes. | |
| * | |
| * @since 1.5.0 | |
| * | |
| * @return true | |
| */ | |
| public function timer_start() { | |
| $this->time_start = microtime( true ); | |
| return true; | |
| } | |
| /** | |
| * Stops the debugging timer. | |
| * | |
| * @since 1.5.0 | |
| * | |
| * @return float Total time spent on the query, in seconds | |
| */ | |
| public function timer_stop() { | |
| return ( microtime( true ) - $this->time_start ); | |
| } | |
| /** | |
| * Wraps errors in a nice header and footer and dies. | |
| * | |
| * Will not die if wpdb::$show_errors is false. | |
| * | |
| * @since 1.5.0 | |
| * | |
| * @param string $message The Error message | |
| * @param string $error_code Optional. A Computer readable string to identify the error. | |
| * @return false|void | |
| */ | |
| public function bail( $message, $error_code = '500' ) { | |
| if ( !$this->show_errors ) { | |
| if ( class_exists( 'WP_Error', false ) ) { | |
| $this->error = new WP_Error($error_code, $message); | |
| } else { | |
| $this->error = $message; | |
| } | |
| return false; | |
| } | |
| wp_die($message); | |
| } | |
| /** | |
| * Whether MySQL database is at least the required minimum version. | |
| * | |
| * @since 2.5.0 | |
| * | |
| * @global string $wp_version | |
| * @global string $required_mysql_version | |
| * | |
| * @return WP_Error|void | |
| */ | |
| public function check_database_version() { | |
| global $wp_version, $required_mysql_version; | |
| // Make sure the server has the required MySQL version | |
| if ( version_compare($this->db_version(), $required_mysql_version, '<') ) | |
| return new WP_Error('database_version', sprintf( __( '<strong>ERROR</strong>: WordPress %1$s requires MySQL %2$s or higher' ), $wp_version, $required_mysql_version )); | |
| } | |
| /** | |
| * Whether the database supports collation. | |
| * | |
| * Called when WordPress is generating the table scheme. | |
| * | |
| * Use `wpdb::has_cap( 'collation' )`. | |
| * | |
| * @since 2.5.0 | |
| * @deprecated 3.5.0 Use wpdb::has_cap() | |
| * | |
| * @return bool True if collation is supported, false if version does not | |
| */ | |
| public function supports_collation() { | |
| _deprecated_function( __FUNCTION__, '3.5', 'wpdb::has_cap( \'collation\' )' ); | |
| return $this->has_cap( 'collation' ); | |
| } | |
| /** | |
| * The database character collate. | |
| * | |
| * @since 3.5.0 | |
| * | |
| * @return string The database character collate. | |
| */ | |
| public function get_charset_collate() { | |
| $charset_collate = ''; | |
| if ( ! empty( $this->charset ) ) | |
| $charset_collate = "DEFAULT CHARACTER SET $this->charset"; | |
| if ( ! empty( $this->collate ) ) | |
| $charset_collate .= " COLLATE $this->collate"; | |
| return $charset_collate; | |
| } | |
| /** | |
| * Determine if a database supports a particular feature. | |
| * | |
| * @since 2.7.0 | |
| * @since 4.1.0 Support was added for the 'utf8mb4' feature. | |
| * | |
| * @see wpdb::db_version() | |
| * | |
| * @param string $db_cap The feature to check for. Accepts 'collation', | |
| * 'group_concat', 'subqueries', 'set_charset', | |
| * or 'utf8mb4'. | |
| * @return int|false Whether the database feature is supported, false otherwise. | |
| */ | |
| public function has_cap( $db_cap ) { | |
| $version = $this->db_version(); | |
| switch ( strtolower( $db_cap ) ) { | |
| case 'collation' : // @since 2.5.0 | |
| case 'group_concat' : // @since 2.7.0 | |
| case 'subqueries' : // @since 2.7.0 | |
| return version_compare( $version, '4.1', '>=' ); | |
| case 'set_charset' : | |
| return version_compare( $version, '5.0.7', '>=' ); | |
| case 'utf8mb4' : // @since 4.1.0 | |
| if ( version_compare( $version, '5.5.3', '<' ) ) { | |
| return false; | |
| } | |
| if ( $this->use_mysqli ) { | |
| $client_version = mysqli_get_client_info(); | |
| } else { | |
| $client_version = mysql_get_client_info(); | |
| } | |
| /* | |
| * libmysql has supported utf8mb4 since 5.5.3, same as the MySQL server. | |
| * mysqlnd has supported utf8mb4 since 5.0.9. | |
| */ | |
| if ( false !== strpos( $client_version, 'mysqlnd' ) ) { | |
| $client_version = preg_replace( '/^\D+([\d.]+).*/', '$1', $client_version ); | |
| return version_compare( $client_version, '5.0.9', '>=' ); | |
| } else { | |
| return version_compare( $client_version, '5.5.3', '>=' ); | |
| } | |
| } | |
| return false; | |
| } | |
| /** | |
| * Retrieve the name of the function that called wpdb. | |
| * | |
| * Searches up the list of functions until it reaches | |
| * the one that would most logically had called this method. | |
| * | |
| * @since 2.5.0 | |
| * | |
| * @return string|array The name of the calling function | |
| */ | |
| public function get_caller() { | |
| return wp_debug_backtrace_summary( __CLASS__ ); | |
| } | |
| /** | |
| * The database version number. | |
| * | |
| * @since 2.7.0 | |
| * | |
| * @return null|string Null on failure, version number on success. | |
| */ | |
| public function db_version() { | |
| if ( $this->use_mysqli ) { | |
| $server_info = mysqli_get_server_info( $this->dbh ); | |
| } else { | |
| $server_info = mysql_get_server_info( $this->dbh ); | |
| } | |
| return preg_replace( '/[^0-9.].*/', '', $server_info ); | |
| } | |
| } |